TY  - CONF
AU  - Radović, Ivan
AU  - Kalinić, Ana
AU  - Karbunar, Lazar
AU  - Mišković, Zoran L.
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13132
AB  - In our recent publication we investigated the impact of plasmon-phonon hybridization on the stopping force acting on a charged particle moving parallel to a sandwich-like structure consisting of two graphene sheets separated by a layer of sapphire. In this work we evaluate the stopping force on a charged particle moving parallel to a graphene layer biased with a drift electric current supported by an insulating substrate. The dielectric function of the system is written in terms of the response function of graphene and the bulk dielectric function of the substrate. Focusing on the range of frequencies from THz to mid-infrared, the response function is expressed in terms of a frequency-dependent conductivity of graphene. The conductivity with a drift current is evaluated using the Galilean Doppler shift model. The energy loss function (the imaginary part of the negative value of the inverse dielectric function) and the stopping force are presented in the cases without and with drifting electrons, showing the effects of the drift velocity on the plasmon-phonon hybridization. The stopping force is also calculated when the drift and electron beam velocities have the same and opposite signs.
C3  - Conference "Catalysts for water splitting and energy storage"
T1  - Stopping force acting on a charged particle moving over a drift-current biased supported graphene
UR  - https://hdl.handle.net/21.15107/rcub_vinar_13132
ER  - 

@conference{
author = "Radović, Ivan and Kalinić, Ana and Karbunar, Lazar and Mišković, Zoran L.",
year = "2024",
abstract = "In our recent publication we investigated the impact of plasmon-phonon hybridization on the stopping force acting on a charged particle moving parallel to a sandwich-like structure consisting of two graphene sheets separated by a layer of sapphire. In this work we evaluate the stopping force on a charged particle moving parallel to a graphene layer biased with a drift electric current supported by an insulating substrate. The dielectric function of the system is written in terms of the response function of graphene and the bulk dielectric function of the substrate. Focusing on the range of frequencies from THz to mid-infrared, the response function is expressed in terms of a frequency-dependent conductivity of graphene. The conductivity with a drift current is evaluated using the Galilean Doppler shift model. The energy loss function (the imaginary part of the negative value of the inverse dielectric function) and the stopping force are presented in the cases without and with drifting electrons, showing the effects of the drift velocity on the plasmon-phonon hybridization. The stopping force is also calculated when the drift and electron beam velocities have the same and opposite signs.",
journal = "Conference "Catalysts for water splitting and energy storage"",
title = "Stopping force acting on a charged particle moving over a drift-current biased supported graphene",
url = "https://hdl.handle.net/21.15107/rcub_vinar_13132"
}

Radović, I., Kalinić, A., Karbunar, L.,& Mišković, Z. L.. (2024). Stopping force acting on a charged particle moving over a drift-current biased supported graphene. in Conference "Catalysts for water splitting and energy storage".
https://hdl.handle.net/21.15107/rcub_vinar_13132

Radović I, Kalinić A, Karbunar L, Mišković ZL. Stopping force acting on a charged particle moving over a drift-current biased supported graphene. in Conference "Catalysts for water splitting and energy storage". 2024;.
https://hdl.handle.net/21.15107/rcub_vinar_13132 .

Radović, Ivan, Kalinić, Ana, Karbunar, Lazar, Mišković, Zoran L., "Stopping force acting on a charged particle moving over a drift-current biased supported graphene" in Conference "Catalysts for water splitting and energy storage" (2024),
https://hdl.handle.net/21.15107/rcub_vinar_13132 .

TY  - JOUR
AU  - Mišković, Zoran L.
AU  - Moshayedi, Milad
AU  - Preciado-Rivas, Maria Rosa
AU  - Jakovac, Josip
AU  - Radović, Ivan
AU  - Despoja, Vito
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11030
AB  - We use Kramers-Kronig analysis and ab initio calculations to develop a simple analytical method for including the effects of high-energy interband electron transitions in the density polarization function of doped graphene and doped phosphorene in the optical limit. The resulting formulas are suitable for applications in the terahertz to the mid-infrared range of frequencies, where the interband electron transitions are shown to give rise to static screening with a suitably chosen in-plane polarizability. In the case of phosphorene, each component of its static polarizability tensor can be computed from a sum-rule–like formula using the ab initio data for the real part of the corresponding component of the full optical interband conductivity tensor of that material.
T2  - Radiation Effects and Defects in Solids
T1  - Modeling of the interband transitions in the optical conductivity of doped two-dimensional materials in the terahertz to the infrared frequency range: the case studies of graphene and phosphorene
VL  - 178
IS  - 1-2
SP  - 54
EP  - 71
DO  - 10.1080/10420150.2023.2186870
ER  - 

@article{
author = "Mišković, Zoran L. and Moshayedi, Milad and Preciado-Rivas, Maria Rosa and Jakovac, Josip and Radović, Ivan and Despoja, Vito",
year = "2023",
abstract = "We use Kramers-Kronig analysis and ab initio calculations to develop a simple analytical method for including the effects of high-energy interband electron transitions in the density polarization function of doped graphene and doped phosphorene in the optical limit. The resulting formulas are suitable for applications in the terahertz to the mid-infrared range of frequencies, where the interband electron transitions are shown to give rise to static screening with a suitably chosen in-plane polarizability. In the case of phosphorene, each component of its static polarizability tensor can be computed from a sum-rule–like formula using the ab initio data for the real part of the corresponding component of the full optical interband conductivity tensor of that material.",
journal = "Radiation Effects and Defects in Solids",
title = "Modeling of the interband transitions in the optical conductivity of doped two-dimensional materials in the terahertz to the infrared frequency range: the case studies of graphene and phosphorene",
volume = "178",
number = "1-2",
pages = "54-71",
doi = "10.1080/10420150.2023.2186870"
}

Mišković, Z. L., Moshayedi, M., Preciado-Rivas, M. R., Jakovac, J., Radović, I.,& Despoja, V.. (2023). Modeling of the interband transitions in the optical conductivity of doped two-dimensional materials in the terahertz to the infrared frequency range: the case studies of graphene and phosphorene. in Radiation Effects and Defects in Solids, 178(1-2), 54-71.
https://doi.org/10.1080/10420150.2023.2186870

Mišković ZL, Moshayedi M, Preciado-Rivas MR, Jakovac J, Radović I, Despoja V. Modeling of the interband transitions in the optical conductivity of doped two-dimensional materials in the terahertz to the infrared frequency range: the case studies of graphene and phosphorene. in Radiation Effects and Defects in Solids. 2023;178(1-2):54-71.
doi:10.1080/10420150.2023.2186870 .

Mišković, Zoran L., Moshayedi, Milad, Preciado-Rivas, Maria Rosa, Jakovac, Josip, Radović, Ivan, Despoja, Vito, "Modeling of the interband transitions in the optical conductivity of doped two-dimensional materials in the terahertz to the infrared frequency range: the case studies of graphene and phosphorene" in Radiation Effects and Defects in Solids, 178, no. 1-2 (2023):54-71,
https://doi.org/10.1080/10420150.2023.2186870 . .

TY  - CONF
AU  - Radović, Ivan
AU  - Kalinić, Ana
AU  - Karbunar, Lazar
AU  - Mišković, Zoran L.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11822
AB  - Electron energy loss spectroscopy (EELS) is a commonly used experimental technique for investigating electronic and plasmonic properties of materials, including van der Waals (vdW) materials [1]. Following Ref. [2] we derive a general expression for the effective dielectric function of multilayered structures made of two-dimensional (2D) vdW materials separated by insulating layers, in terms of the dielectric functions of the insulating layers and the 2D response functions of the vdW sheets, so the EEL spectrum of such structures may be deduced and compared with the available experimental data. In our previous publications [3-5] we investigated the effects of plasmon-phonon hybridization in graphene-insulator-graphene heterostructures. In all those publications we assumed a zero gap between graphene and insulator to simplify calculations. In this work we assign for the first time a finite gap size between graphene and insulator, and apply the general expression for the effective dielectric function of multilayered structures to the case of graphene-insulator-graphene composite. The energy loss function (the imaginary part of the negative value of the inverse dielectric function) is shown for the cases of graphene-insulator-graphene composite systems with and without the finite gap size between graphene and insulator in order to study the role of graphene-insulator distance on the hybridization between the Dirac plasmons in graphene layers and the Fuchs-Kliewer phonons in both surfaces of the insulator slab. The response function of each graphene is obtained using the dynamic polarization function of graphene within the random phase approximation for its π electrons described as Dirac’s fermions. The response of the insulator layer is described by a dielectric function consisting of several Lorentzian terms.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - Electron energy loss spectroscopy of multilayered structures: Theoretical aspects and the role of graphene-insulator distance
SP  - 128
EP  - 128
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11822
ER  - 

@conference{
author = "Radović, Ivan and Kalinić, Ana and Karbunar, Lazar and Mišković, Zoran L.",
year = "2023",
abstract = "Electron energy loss spectroscopy (EELS) is a commonly used experimental technique for investigating electronic and plasmonic properties of materials, including van der Waals (vdW) materials [1]. Following Ref. [2] we derive a general expression for the effective dielectric function of multilayered structures made of two-dimensional (2D) vdW materials separated by insulating layers, in terms of the dielectric functions of the insulating layers and the 2D response functions of the vdW sheets, so the EEL spectrum of such structures may be deduced and compared with the available experimental data. In our previous publications [3-5] we investigated the effects of plasmon-phonon hybridization in graphene-insulator-graphene heterostructures. In all those publications we assumed a zero gap between graphene and insulator to simplify calculations. In this work we assign for the first time a finite gap size between graphene and insulator, and apply the general expression for the effective dielectric function of multilayered structures to the case of graphene-insulator-graphene composite. The energy loss function (the imaginary part of the negative value of the inverse dielectric function) is shown for the cases of graphene-insulator-graphene composite systems with and without the finite gap size between graphene and insulator in order to study the role of graphene-insulator distance on the hybridization between the Dirac plasmons in graphene layers and the Fuchs-Kliewer phonons in both surfaces of the insulator slab. The response function of each graphene is obtained using the dynamic polarization function of graphene within the random phase approximation for its π electrons described as Dirac’s fermions. The response of the insulator layer is described by a dielectric function consisting of several Lorentzian terms.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "Electron energy loss spectroscopy of multilayered structures: Theoretical aspects and the role of graphene-insulator distance",
pages = "128-128",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11822"
}

Radović, I., Kalinić, A., Karbunar, L.,& Mišković, Z. L.. (2023). Electron energy loss spectroscopy of multilayered structures: Theoretical aspects and the role of graphene-insulator distance. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 128-128.
https://hdl.handle.net/21.15107/rcub_vinar_11822

Radović I, Kalinić A, Karbunar L, Mišković ZL. Electron energy loss spectroscopy of multilayered structures: Theoretical aspects and the role of graphene-insulator distance. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:128-128.
https://hdl.handle.net/21.15107/rcub_vinar_11822 .

Radović, Ivan, Kalinić, Ana, Karbunar, Lazar, Mišković, Zoran L., "Electron energy loss spectroscopy of multilayered structures: Theoretical aspects and the role of graphene-insulator distance" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):128-128,
https://hdl.handle.net/21.15107/rcub_vinar_11822 .

TY  - CONF
AU  - Radović, Ivan
AU  - Kalinić, Ana
AU  - Karbunar, Lazar
AU  - Mišković, Zoran L.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11823
AB  - In our previous publications [1-4] we studied the effects of plasmon-phonon hybridization in graphene supported by an insulating substrate [1], as well as in graphene-insulator-graphene composite systems [2-4]. In this work we investigate the hybridization between the Dirac plasmon in graphene layer biased with a drift electric current and the surface optical phonon modes in the insulating substrate. The dielectric function of the system is written in terms of the response function of graphene and the bulk dielectric function of the substrate. The response function is expressed in terms of a nonlocal conductivity of graphene. The intraband conductivity of graphene is obtained using the Boltzmann theory [5-6], whereas the effects of high-energy interband electron transitions are accounted for by using a linear function of frequency for the imaginary part of the interband conductivity [7]. The conductivity with a drift current is evaluated using the Galilean Doppler shift model [8,9]. The energy loss function (the imaginary part of the negative value of the inverse dielectric function) is presented for three different values of the drifting velocities of electrons showing the effects of the drift velocity on the plasmon-phonon hybridization.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - Plasmon-phonon hybridization in drift-current biased supported graphene
SP  - 129
EP  - 129
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11823
ER  - 

@conference{
author = "Radović, Ivan and Kalinić, Ana and Karbunar, Lazar and Mišković, Zoran L.",
year = "2023",
abstract = "In our previous publications [1-4] we studied the effects of plasmon-phonon hybridization in graphene supported by an insulating substrate [1], as well as in graphene-insulator-graphene composite systems [2-4]. In this work we investigate the hybridization between the Dirac plasmon in graphene layer biased with a drift electric current and the surface optical phonon modes in the insulating substrate. The dielectric function of the system is written in terms of the response function of graphene and the bulk dielectric function of the substrate. The response function is expressed in terms of a nonlocal conductivity of graphene. The intraband conductivity of graphene is obtained using the Boltzmann theory [5-6], whereas the effects of high-energy interband electron transitions are accounted for by using a linear function of frequency for the imaginary part of the interband conductivity [7]. The conductivity with a drift current is evaluated using the Galilean Doppler shift model [8,9]. The energy loss function (the imaginary part of the negative value of the inverse dielectric function) is presented for three different values of the drifting velocities of electrons showing the effects of the drift velocity on the plasmon-phonon hybridization.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "Plasmon-phonon hybridization in drift-current biased supported graphene",
pages = "129-129",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11823"
}

Radović, I., Kalinić, A., Karbunar, L.,& Mišković, Z. L.. (2023). Plasmon-phonon hybridization in drift-current biased supported graphene. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 129-129.
https://hdl.handle.net/21.15107/rcub_vinar_11823

Radović I, Kalinić A, Karbunar L, Mišković ZL. Plasmon-phonon hybridization in drift-current biased supported graphene. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:129-129.
https://hdl.handle.net/21.15107/rcub_vinar_11823 .

Radović, Ivan, Kalinić, Ana, Karbunar, Lazar, Mišković, Zoran L., "Plasmon-phonon hybridization in drift-current biased supported graphene" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):129-129,
https://hdl.handle.net/21.15107/rcub_vinar_11823 .

TY  - CONF
AU  - Kalinić, Ana
AU  - Radović, Ivan
AU  - Despoja, Vito
AU  - Karbunar, Lazar
AU  - Mišković, Zoran
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12056
AB  - We investigate the stopping and image forces acting on an external charged particle moving parallel to a sandwich-like structure consisting of two graphene sheets separated by a layer of Al2O3 (sapphire), as depicted in FIG. 1. The effective dielectric function of the system is obtained using two descriptions of the electronic response of doped graphene: an ab initio method based on the time-dependent density functional theory calculations and an analytical expression based on the massless Dirac fermion (MDF) approximation for graphene π bands. It is found that the main discrepancies between the two methods come from the high-energy interband electron transitions, which are included in the ab initio method but not in the MDF method. Special attention is paid to the regime of low-particle speeds, where the MDF method compares well with the ab initio method, but the modeling is sensitive to the effects of finite temperature and the treatment of phenomenological damping. We also provide a semi-analytical analysis based on a modal decomposition of the energy loss function, for which we discuss the limit of a thick graphene-Al2O3-graphene structure.
C3  - SFKM 2023 : The 21st Symposium on Condensed Matter Physics : Book of abstracts
T1  - Dynamic-Polarization Forces Acting On A Charged Particle Moving Over A Graphene-Sapphire-Graphene Heterostructure
SP  - 82
EP  - 82
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12056
ER  - 

@conference{
author = "Kalinić, Ana and Radović, Ivan and Despoja, Vito and Karbunar, Lazar and Mišković, Zoran",
year = "2023",
abstract = "We investigate the stopping and image forces acting on an external charged particle moving parallel to a sandwich-like structure consisting of two graphene sheets separated by a layer of Al2O3 (sapphire), as depicted in FIG. 1. The effective dielectric function of the system is obtained using two descriptions of the electronic response of doped graphene: an ab initio method based on the time-dependent density functional theory calculations and an analytical expression based on the massless Dirac fermion (MDF) approximation for graphene π bands. It is found that the main discrepancies between the two methods come from the high-energy interband electron transitions, which are included in the ab initio method but not in the MDF method. Special attention is paid to the regime of low-particle speeds, where the MDF method compares well with the ab initio method, but the modeling is sensitive to the effects of finite temperature and the treatment of phenomenological damping. We also provide a semi-analytical analysis based on a modal decomposition of the energy loss function, for which we discuss the limit of a thick graphene-Al2O3-graphene structure.",
journal = "SFKM 2023 : The 21st Symposium on Condensed Matter Physics : Book of abstracts",
title = "Dynamic-Polarization Forces Acting On A Charged Particle Moving Over A Graphene-Sapphire-Graphene Heterostructure",
pages = "82-82",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12056"
}

Kalinić, A., Radović, I., Despoja, V., Karbunar, L.,& Mišković, Z.. (2023). Dynamic-Polarization Forces Acting On A Charged Particle Moving Over A Graphene-Sapphire-Graphene Heterostructure. in SFKM 2023 : The 21st Symposium on Condensed Matter Physics : Book of abstracts, 82-82.
https://hdl.handle.net/21.15107/rcub_vinar_12056

Kalinić A, Radović I, Despoja V, Karbunar L, Mišković Z. Dynamic-Polarization Forces Acting On A Charged Particle Moving Over A Graphene-Sapphire-Graphene Heterostructure. in SFKM 2023 : The 21st Symposium on Condensed Matter Physics : Book of abstracts. 2023;:82-82.
https://hdl.handle.net/21.15107/rcub_vinar_12056 .

Kalinić, Ana, Radović, Ivan, Despoja, Vito, Karbunar, Lazar, Mišković, Zoran, "Dynamic-Polarization Forces Acting On A Charged Particle Moving Over A Graphene-Sapphire-Graphene Heterostructure" in SFKM 2023 : The 21st Symposium on Condensed Matter Physics : Book of abstracts (2023):82-82,
https://hdl.handle.net/21.15107/rcub_vinar_12056 .

TY  - CONF
AU  - Kalinić, Ana
AU  - Radović, Ivan
AU  - Despoja, Vito
AU  - Karbunar, Lazar
AU  - Mišković, Zoran
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12074
AB  - In our previous publication [1] we studied the wake potential induced by an external charged particle that moves parallel to various sy1 -Al2O3-sy2 composites, where syi (with i=1,2) may be vacuum, pristine (undoped) graphene, or doped graphene. Several important parameters were fixed at their respective typical values: the distance of the charged particle from the closest surface, the thickness of the Al2O3 layer, and the doping density of graphene. In our recent publication [2] we presented a detailed study of the effects due to variations of all those parameters in the case of the wake potential produced by the charged particle moving parallel to the graphene-Al2O3-graphene composite system. In both mentioned publications we assumed a zero gap between graphene and insulator to simplify calculations. In this work we assign for the first time a finite gap size between graphene and insulator, and vary the speed of the projectile moving parallel to the structure and the particle distance. Using the Dyson-Schwinger equation [3] we recalculate the wake potential in the graphene-insulator-graphene heterostructure and study the effects of the graphene-insulator distance. The polarization functions of graphene sheets are obtained using two approaches within the random phase approximation [3]: an ab initio method and a method based on the massless Dirac fermion approximation. The dynamic response of the insulator layer is described by a dielectric function consisting of several Lorentzian terms.
C3  - COST 18234 Meeting in Israel : International Conference on Development of Nanocrystal Materials Through Computational Modelling : Posters abstracts
T1  - Wake Potential in Graphene-insulator-graphene Heterostructure: the Role of Graphene-insulator Distance
SP  - 5
EP  - 5
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12074
ER  - 

@conference{
author = "Kalinić, Ana and Radović, Ivan and Despoja, Vito and Karbunar, Lazar and Mišković, Zoran",
year = "2023",
abstract = "In our previous publication [1] we studied the wake potential induced by an external charged particle that moves parallel to various sy1 -Al2O3-sy2 composites, where syi (with i=1,2) may be vacuum, pristine (undoped) graphene, or doped graphene. Several important parameters were fixed at their respective typical values: the distance of the charged particle from the closest surface, the thickness of the Al2O3 layer, and the doping density of graphene. In our recent publication [2] we presented a detailed study of the effects due to variations of all those parameters in the case of the wake potential produced by the charged particle moving parallel to the graphene-Al2O3-graphene composite system. In both mentioned publications we assumed a zero gap between graphene and insulator to simplify calculations. In this work we assign for the first time a finite gap size between graphene and insulator, and vary the speed of the projectile moving parallel to the structure and the particle distance. Using the Dyson-Schwinger equation [3] we recalculate the wake potential in the graphene-insulator-graphene heterostructure and study the effects of the graphene-insulator distance. The polarization functions of graphene sheets are obtained using two approaches within the random phase approximation [3]: an ab initio method and a method based on the massless Dirac fermion approximation. The dynamic response of the insulator layer is described by a dielectric function consisting of several Lorentzian terms.",
journal = "COST 18234 Meeting in Israel : International Conference on Development of Nanocrystal Materials Through Computational Modelling : Posters abstracts",
title = "Wake Potential in Graphene-insulator-graphene Heterostructure: the Role of Graphene-insulator Distance",
pages = "5-5",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12074"
}

Kalinić, A., Radović, I., Despoja, V., Karbunar, L.,& Mišković, Z.. (2023). Wake Potential in Graphene-insulator-graphene Heterostructure: the Role of Graphene-insulator Distance. in COST 18234 Meeting in Israel : International Conference on Development of Nanocrystal Materials Through Computational Modelling : Posters abstracts, 5-5.
https://hdl.handle.net/21.15107/rcub_vinar_12074

Kalinić A, Radović I, Despoja V, Karbunar L, Mišković Z. Wake Potential in Graphene-insulator-graphene Heterostructure: the Role of Graphene-insulator Distance. in COST 18234 Meeting in Israel : International Conference on Development of Nanocrystal Materials Through Computational Modelling : Posters abstracts. 2023;:5-5.
https://hdl.handle.net/21.15107/rcub_vinar_12074 .

Kalinić, Ana, Radović, Ivan, Despoja, Vito, Karbunar, Lazar, Mišković, Zoran, "Wake Potential in Graphene-insulator-graphene Heterostructure: the Role of Graphene-insulator Distance" in COST 18234 Meeting in Israel : International Conference on Development of Nanocrystal Materials Through Computational Modelling : Posters abstracts (2023):5-5,
https://hdl.handle.net/21.15107/rcub_vinar_12074 .

TY  - CONF
AU  - Kalinić, Ana
AU  - Radović, Ivan
AU  - Karbunar, Lazar
AU  - Despoja, Vito
AU  - Mišković, Zoran L.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12053
AB  - We derive an analytical expression for the stopping force acting on an external charged particle moving parallel to a sandwich-like structure consisting of two undoped graphene sheets separated by a layer of Al2O3 (sapphire).
C3  - Publications of the Astronomical Observatory of Belgrade
T1  - Analytical expression for stopping force acting on a slow charged particle moving parallel to a thick graphene-sapphire-graphene structure
VL  - 102
SP  - 117
EP  - 120
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12053
ER  - 

@conference{
author = "Kalinić, Ana and Radović, Ivan and Karbunar, Lazar and Despoja, Vito and Mišković, Zoran L.",
year = "2022",
abstract = "We derive an analytical expression for the stopping force acting on an external charged particle moving parallel to a sandwich-like structure consisting of two undoped graphene sheets separated by a layer of Al2O3 (sapphire).",
journal = "Publications of the Astronomical Observatory of Belgrade",
title = "Analytical expression for stopping force acting on a slow charged particle moving parallel to a thick graphene-sapphire-graphene structure",
volume = "102",
pages = "117-120",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12053"
}

Kalinić, A., Radović, I., Karbunar, L., Despoja, V.,& Mišković, Z. L.. (2022). Analytical expression for stopping force acting on a slow charged particle moving parallel to a thick graphene-sapphire-graphene structure. in Publications of the Astronomical Observatory of Belgrade, 102, 117-120.
https://hdl.handle.net/21.15107/rcub_vinar_12053

Kalinić A, Radović I, Karbunar L, Despoja V, Mišković ZL. Analytical expression for stopping force acting on a slow charged particle moving parallel to a thick graphene-sapphire-graphene structure. in Publications of the Astronomical Observatory of Belgrade. 2022;102:117-120.
https://hdl.handle.net/21.15107/rcub_vinar_12053 .

Kalinić, Ana, Radović, Ivan, Karbunar, Lazar, Despoja, Vito, Mišković, Zoran L., "Analytical expression for stopping force acting on a slow charged particle moving parallel to a thick graphene-sapphire-graphene structure" in Publications of the Astronomical Observatory of Belgrade, 102 (2022):117-120,
https://hdl.handle.net/21.15107/rcub_vinar_12053 .

TY  - JOUR
AU  - Marušić, Leonardo
AU  - Kalinić, Ana
AU  - Radović, Ivan
AU  - Jakovac, Josip
AU  - Mišković, Zoran L.
AU  - Despoja, Vito
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10245
AB  - Graphene doped by alkali atoms (ACx) supports two heavily populated bands (π and σ) crossing the Fermi level, which enables the formation of two intense two-dimensional plasmons: the Dirac plasmon (DP) and the acoustic plasmon (AP). Although the mechanism of the formation of these plasmons in electrostatically biased graphene or at noble metal surfaces is well known, the mechanism of their formation in alkali-doped graphenes is still not completely understood. We shall demonstrate that two isoelectronic systems, KC8 and CsC8, support substantially different plasmonic spectra: the KC8 supports a sharp DP and a well-defined AP, while the CsC8 supports a broad DP and does not support an AP at all. We shall demonstrate that the AP in an ACx is not, as previously believed, just a consequence of the interplay of the π and σ intraband transitions, but a very subtle interplay between these transitions and the background screening, caused by the out-of-plane interband C(π)→A(σ) transitions.
T2  - International Journal of Molecular Sciences
T1  - Resolving the Mechanism of Acoustic Plasmon Instability in Graphene Doped by Alkali Metals
VL  - 23
IS  - 9
SP  - 4770
DO  - 10.3390/ijms23094770
ER  - 

@article{
author = "Marušić, Leonardo and Kalinić, Ana and Radović, Ivan and Jakovac, Josip and Mišković, Zoran L. and Despoja, Vito",
year = "2022",
abstract = "Graphene doped by alkali atoms (ACx) supports two heavily populated bands (π and σ) crossing the Fermi level, which enables the formation of two intense two-dimensional plasmons: the Dirac plasmon (DP) and the acoustic plasmon (AP). Although the mechanism of the formation of these plasmons in electrostatically biased graphene or at noble metal surfaces is well known, the mechanism of their formation in alkali-doped graphenes is still not completely understood. We shall demonstrate that two isoelectronic systems, KC8 and CsC8, support substantially different plasmonic spectra: the KC8 supports a sharp DP and a well-defined AP, while the CsC8 supports a broad DP and does not support an AP at all. We shall demonstrate that the AP in an ACx is not, as previously believed, just a consequence of the interplay of the π and σ intraband transitions, but a very subtle interplay between these transitions and the background screening, caused by the out-of-plane interband C(π)→A(σ) transitions.",
journal = "International Journal of Molecular Sciences",
title = "Resolving the Mechanism of Acoustic Plasmon Instability in Graphene Doped by Alkali Metals",
volume = "23",
number = "9",
pages = "4770",
doi = "10.3390/ijms23094770"
}

Marušić, L., Kalinić, A., Radović, I., Jakovac, J., Mišković, Z. L.,& Despoja, V.. (2022). Resolving the Mechanism of Acoustic Plasmon Instability in Graphene Doped by Alkali Metals. in International Journal of Molecular Sciences, 23(9), 4770.
https://doi.org/10.3390/ijms23094770

Marušić L, Kalinić A, Radović I, Jakovac J, Mišković ZL, Despoja V. Resolving the Mechanism of Acoustic Plasmon Instability in Graphene Doped by Alkali Metals. in International Journal of Molecular Sciences. 2022;23(9):4770.
doi:10.3390/ijms23094770 .

Marušić, Leonardo, Kalinić, Ana, Radović, Ivan, Jakovac, Josip, Mišković, Zoran L., Despoja, Vito, "Resolving the Mechanism of Acoustic Plasmon Instability in Graphene Doped by Alkali Metals" in International Journal of Molecular Sciences, 23, no. 9 (2022):4770,
https://doi.org/10.3390/ijms23094770 . .

TY  - JOUR
AU  - Kalinić, Ana
AU  - Despoja, Vito
AU  - Radović, Ivan
AU  - Karbunar, Lazar
AU  - Mišković, Zoran L.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10453
AB  - We study the impact of plasmon-phonon hybridization on the stopping and image forces acting on a charged particle moving parallel to a graphene-Al2O3-graphene sandwichlike composite system by considering a broad domain in the parameter space. The effective dielectric function of the system is obtained using two descriptions of the electronic response of doped graphene: an ab initio method based on the time-dependent density functional theory calculations and an analytical expression based on the massless Dirac fermion (MDF) approximation for graphene π bands. It is found that the main discrepancies between the two methods come from the high-energy interband electron transitions, which are included in the ab initio method but not in the MDF method. Special attention is paid to the regime of low-particle speeds, where the MDF method compares well with the ab initio method, but the modeling is sensitive to the effects of finite temperature and the treatment of phenomenological damping. It is observed at low particle speeds that both forces exhibit an interesting interplay between the hybrid modes of the phononic type and the continuum of the intraband electron-hole excitations in graphene. Furthermore, the effects of the lowest-energy antisymmetric modes, which exhibit acoustic dispersions at long wavelengths in a system with equally doped graphene layers, are exposed in calculations of the stopping force on a co-moving pair of incident particles with opposite charges that are symmetrically positioned around the target system.
T2  - Physical Review B
T1  - Stopping and image forces acting on a charged particle moving near a graphene-Al2O3-graphene heterostructure
VL  - 106
IS  - 11
SP  - 115430
DO  - 10.1103/PhysRevB.106.115430
ER  - 

@article{
author = "Kalinić, Ana and Despoja, Vito and Radović, Ivan and Karbunar, Lazar and Mišković, Zoran L.",
year = "2022",
abstract = "We study the impact of plasmon-phonon hybridization on the stopping and image forces acting on a charged particle moving parallel to a graphene-Al2O3-graphene sandwichlike composite system by considering a broad domain in the parameter space. The effective dielectric function of the system is obtained using two descriptions of the electronic response of doped graphene: an ab initio method based on the time-dependent density functional theory calculations and an analytical expression based on the massless Dirac fermion (MDF) approximation for graphene π bands. It is found that the main discrepancies between the two methods come from the high-energy interband electron transitions, which are included in the ab initio method but not in the MDF method. Special attention is paid to the regime of low-particle speeds, where the MDF method compares well with the ab initio method, but the modeling is sensitive to the effects of finite temperature and the treatment of phenomenological damping. It is observed at low particle speeds that both forces exhibit an interesting interplay between the hybrid modes of the phononic type and the continuum of the intraband electron-hole excitations in graphene. Furthermore, the effects of the lowest-energy antisymmetric modes, which exhibit acoustic dispersions at long wavelengths in a system with equally doped graphene layers, are exposed in calculations of the stopping force on a co-moving pair of incident particles with opposite charges that are symmetrically positioned around the target system.",
journal = "Physical Review B",
title = "Stopping and image forces acting on a charged particle moving near a graphene-Al2O3-graphene heterostructure",
volume = "106",
number = "11",
pages = "115430",
doi = "10.1103/PhysRevB.106.115430"
}

Kalinić, A., Despoja, V., Radović, I., Karbunar, L.,& Mišković, Z. L.. (2022). Stopping and image forces acting on a charged particle moving near a graphene-Al2O3-graphene heterostructure. in Physical Review B, 106(11), 115430.
https://doi.org/10.1103/PhysRevB.106.115430

Kalinić A, Despoja V, Radović I, Karbunar L, Mišković ZL. Stopping and image forces acting on a charged particle moving near a graphene-Al2O3-graphene heterostructure. in Physical Review B. 2022;106(11):115430.
doi:10.1103/PhysRevB.106.115430 .

Kalinić, Ana, Despoja, Vito, Radović, Ivan, Karbunar, Lazar, Mišković, Zoran L., "Stopping and image forces acting on a charged particle moving near a graphene-Al2O3-graphene heterostructure" in Physical Review B, 106, no. 11 (2022):115430,
https://doi.org/10.1103/PhysRevB.106.115430 . .

TY  - JOUR
AU  - Kalinić, Ana
AU  - Radović, Ivan
AU  - Karbunar, Lazar
AU  - Despoja, Vito
AU  - Mišković, Zoran L.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11685
AB  - We study the wake effect in a graphene-Al2O3-graphene composite system induced by an external charged particle moving parallel to it by using the dynamic polarization function of graphene within the random phase approximation for its π electrons described as Dirac's fermions and by using a local dielectric function for the bulk sapphire (aluminum oxide, Al2O3). We explore the effects of variation of the particle speed, its distance from the top graphene layer, the thickness of the Al2O3 layer, the damping rate of plasmons in graphene, and the doping density (i.e., Fermi energy) of graphene on the wake potential. For the velocity of the charged particle below the threshold for excitations of the Dirac plasmon in graphene, given by its Fermi velocity , strong effects are observed due to variation of the particle distance, while for the velocity of the charged particle above strong effects are observed due to varying the thickness of the Al2O3 layer, as well as due to plasmon damping of graphene's π electrons, and graphene doping.
T2  - Physica E: Low-dimensional Systems and Nanostructures
T1  - Wake effect in interactions of ions with graphene-sapphire-graphene composite system
VL  - 126
SP  - 114447
DO  - 10.1016/j.physe.2020.114447
ER  - 

@article{
author = "Kalinić, Ana and Radović, Ivan and Karbunar, Lazar and Despoja, Vito and Mišković, Zoran L.",
year = "2021",
abstract = "We study the wake effect in a graphene-Al2O3-graphene composite system induced by an external charged particle moving parallel to it by using the dynamic polarization function of graphene within the random phase approximation for its π electrons described as Dirac's fermions and by using a local dielectric function for the bulk sapphire (aluminum oxide, Al2O3). We explore the effects of variation of the particle speed, its distance from the top graphene layer, the thickness of the Al2O3 layer, the damping rate of plasmons in graphene, and the doping density (i.e., Fermi energy) of graphene on the wake potential. For the velocity of the charged particle below the threshold for excitations of the Dirac plasmon in graphene, given by its Fermi velocity , strong effects are observed due to variation of the particle distance, while for the velocity of the charged particle above strong effects are observed due to varying the thickness of the Al2O3 layer, as well as due to plasmon damping of graphene's π electrons, and graphene doping.",
journal = "Physica E: Low-dimensional Systems and Nanostructures",
title = "Wake effect in interactions of ions with graphene-sapphire-graphene composite system",
volume = "126",
pages = "114447",
doi = "10.1016/j.physe.2020.114447"
}

Kalinić, A., Radović, I., Karbunar, L., Despoja, V.,& Mišković, Z. L.. (2021). Wake effect in interactions of ions with graphene-sapphire-graphene composite system. in Physica E: Low-dimensional Systems and Nanostructures, 126, 114447.
https://doi.org/10.1016/j.physe.2020.114447

Kalinić A, Radović I, Karbunar L, Despoja V, Mišković ZL. Wake effect in interactions of ions with graphene-sapphire-graphene composite system. in Physica E: Low-dimensional Systems and Nanostructures. 2021;126:114447.
doi:10.1016/j.physe.2020.114447 .

Kalinić, Ana, Radović, Ivan, Karbunar, Lazar, Despoja, Vito, Mišković, Zoran L., "Wake effect in interactions of ions with graphene-sapphire-graphene composite system" in Physica E: Low-dimensional Systems and Nanostructures, 126 (2021):114447,
https://doi.org/10.1016/j.physe.2020.114447 . .

TY  - JOUR
AU  - Bai, Xiang-Jia
AU  - Zhang, Ying-Ying
AU  - Mišković, Zoran L.
AU  - Radović, Ivan
AU  - Li, Chun-Zhi
AU  - Song, Yuan-Hong
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9552
AB  - We analyze the effects of the strain-induced pseudomagnetic field on the subthreshold mechanism of hybridization taking place between the Dirac plasmon in graphene and the surface optical phonon modes in a nearby substrate. It is shown that the pseudomagnetic field exerts quite strong influence on the oscillatory pattern in the total potential in the plane of graphene, as well as on the stopping and the image forces on a charge, which moves parallel to the graphene at a speed below the Fermi velocity, specially for small graphene–substrate gap sizes. One may conclude that the subthreshold mechanism of the plasmon–phonon hybridization can be controlled by varying the pseudomagnetic field strength and the doping density in graphene. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.
T2  - Plasmonics
T1  - The Effects of Pseudomagnetic Fields on Plasmon–Phonon Hybridization in Supported Graphene Probed by a Moving Charged Particle
VL  - 16
IS  - 4
SP  - 1089
EP  - 1098
DO  - 10.1007/s11468-020-01369-3
ER  - 

@article{
author = "Bai, Xiang-Jia and Zhang, Ying-Ying and Mišković, Zoran L. and Radović, Ivan and Li, Chun-Zhi and Song, Yuan-Hong",
year = "2021",
abstract = "We analyze the effects of the strain-induced pseudomagnetic field on the subthreshold mechanism of hybridization taking place between the Dirac plasmon in graphene and the surface optical phonon modes in a nearby substrate. It is shown that the pseudomagnetic field exerts quite strong influence on the oscillatory pattern in the total potential in the plane of graphene, as well as on the stopping and the image forces on a charge, which moves parallel to the graphene at a speed below the Fermi velocity, specially for small graphene–substrate gap sizes. One may conclude that the subthreshold mechanism of the plasmon–phonon hybridization can be controlled by varying the pseudomagnetic field strength and the doping density in graphene. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.",
journal = "Plasmonics",
title = "The Effects of Pseudomagnetic Fields on Plasmon–Phonon Hybridization in Supported Graphene Probed by a Moving Charged Particle",
volume = "16",
number = "4",
pages = "1089-1098",
doi = "10.1007/s11468-020-01369-3"
}

Bai, X., Zhang, Y., Mišković, Z. L., Radović, I., Li, C.,& Song, Y.. (2021). The Effects of Pseudomagnetic Fields on Plasmon–Phonon Hybridization in Supported Graphene Probed by a Moving Charged Particle. in Plasmonics, 16(4), 1089-1098.
https://doi.org/10.1007/s11468-020-01369-3

Bai X, Zhang Y, Mišković ZL, Radović I, Li C, Song Y. The Effects of Pseudomagnetic Fields on Plasmon–Phonon Hybridization in Supported Graphene Probed by a Moving Charged Particle. in Plasmonics. 2021;16(4):1089-1098.
doi:10.1007/s11468-020-01369-3 .

Bai, Xiang-Jia, Zhang, Ying-Ying, Mišković, Zoran L., Radović, Ivan, Li, Chun-Zhi, Song, Yuan-Hong, "The Effects of Pseudomagnetic Fields on Plasmon–Phonon Hybridization in Supported Graphene Probed by a Moving Charged Particle" in Plasmonics, 16, no. 4 (2021):1089-1098,
https://doi.org/10.1007/s11468-020-01369-3 . .

TY  - CONF
AU  - Kalinić, Ana
AU  - Radović, Ivan
AU  - Karbunar, Lazar
AU  - Despoja, Vito
AU  - Mišković, Zoran L.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12054
AB  - We derive general expressions for the stopping and image forces on an external charged particle moving parallel to a sandwich-like structure consisting of two doped graphene sheets separated by a layer of Al2O3 (sapphire)
C3  - Publications of the Astronomical Observatory of Belgrade
T1  - Interactions of ions with graphene-sapphire-graphene composite system: Stopping force and image force
VL  - 99
SP  - 97
EP  - 100
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12054
ER  - 

@conference{
author = "Kalinić, Ana and Radović, Ivan and Karbunar, Lazar and Despoja, Vito and Mišković, Zoran L.",
year = "2020",
abstract = "We derive general expressions for the stopping and image forces on an external charged particle moving parallel to a sandwich-like structure consisting of two doped graphene sheets separated by a layer of Al2O3 (sapphire)",
journal = "Publications of the Astronomical Observatory of Belgrade",
title = "Interactions of ions with graphene-sapphire-graphene composite system: Stopping force and image force",
volume = "99",
pages = "97-100",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12054"
}

Kalinić, A., Radović, I., Karbunar, L., Despoja, V.,& Mišković, Z. L.. (2020). Interactions of ions with graphene-sapphire-graphene composite system: Stopping force and image force. in Publications of the Astronomical Observatory of Belgrade, 99, 97-100.
https://hdl.handle.net/21.15107/rcub_vinar_12054

Kalinić A, Radović I, Karbunar L, Despoja V, Mišković ZL. Interactions of ions with graphene-sapphire-graphene composite system: Stopping force and image force. in Publications of the Astronomical Observatory of Belgrade. 2020;99:97-100.
https://hdl.handle.net/21.15107/rcub_vinar_12054 .

Kalinić, Ana, Radović, Ivan, Karbunar, Lazar, Despoja, Vito, Mišković, Zoran L., "Interactions of ions with graphene-sapphire-graphene composite system: Stopping force and image force" in Publications of the Astronomical Observatory of Belgrade, 99 (2020):97-100,
https://hdl.handle.net/21.15107/rcub_vinar_12054 .

TY  - CONF
AU  - Kalinić, Ana
AU  - Radović, Ivan
AU  - Karbunar, Lazar
AU  - Despoja, Vito
AU  - Mišković, Zoran L.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12676
AB  - In our recent publication1 we have studied the wake potential induced by an external charged particle that moves parallel to various sy1-Al2O3-sy2 composites, where syi (with i=1,2) may be vacuum, pristine graphene, or doped graphene. Several important parameters were fixed at their respective typical values: the distance of the charged particle from the closest surface, the thickness of the sapphire (aluminum oxide, Al2O3) layer, and the doping density (i.e., Fermi energy) of graphene. In this work we present a detailed study of the effects due to variations of all those parameters in the case of the wake potential produced by charged particle moving parallel to the graphene-Al2O3- graphene composite system, by using the dynamic polarization function of graphene within the random phase approximation for its π electrons described as Dirac’s fermions and by using a local dielectric function for the sapphire layer2 . For the velocity of the charged particle below the threshold for excitations of the Dirac plasmon in graphene, given by its Fermi velocity vF, strong effects are observed due to variation of the particle distance, while for the velocity of the charged particle above vF strong effects are observed due to varying the thickness of the Al2O3 layer, as well as due to graphene doping.
PB  - Gradec, Slovenija : Fakulteta za tehnologijo polimerov
C3  - COST Action CA15107 : Final Multicomp meeting : Book of Abstracts
T1  - Wake effect in interactions of ions with graphene-sapphire-graphene structure
SP  - 33
EP  - 33
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12676
ER  - 

@conference{
author = "Kalinić, Ana and Radović, Ivan and Karbunar, Lazar and Despoja, Vito and Mišković, Zoran L.",
year = "2020",
abstract = "In our recent publication1 we have studied the wake potential induced by an external charged particle that moves parallel to various sy1-Al2O3-sy2 composites, where syi (with i=1,2) may be vacuum, pristine graphene, or doped graphene. Several important parameters were fixed at their respective typical values: the distance of the charged particle from the closest surface, the thickness of the sapphire (aluminum oxide, Al2O3) layer, and the doping density (i.e., Fermi energy) of graphene. In this work we present a detailed study of the effects due to variations of all those parameters in the case of the wake potential produced by charged particle moving parallel to the graphene-Al2O3- graphene composite system, by using the dynamic polarization function of graphene within the random phase approximation for its π electrons described as Dirac’s fermions and by using a local dielectric function for the sapphire layer2 . For the velocity of the charged particle below the threshold for excitations of the Dirac plasmon in graphene, given by its Fermi velocity vF, strong effects are observed due to variation of the particle distance, while for the velocity of the charged particle above vF strong effects are observed due to varying the thickness of the Al2O3 layer, as well as due to graphene doping.",
publisher = "Gradec, Slovenija : Fakulteta za tehnologijo polimerov",
journal = "COST Action CA15107 : Final Multicomp meeting : Book of Abstracts",
title = "Wake effect in interactions of ions with graphene-sapphire-graphene structure",
pages = "33-33",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12676"
}

Kalinić, A., Radović, I., Karbunar, L., Despoja, V.,& Mišković, Z. L.. (2020). Wake effect in interactions of ions with graphene-sapphire-graphene structure. in COST Action CA15107 : Final Multicomp meeting : Book of Abstracts
Gradec, Slovenija : Fakulteta za tehnologijo polimerov., 33-33.
https://hdl.handle.net/21.15107/rcub_vinar_12676

Kalinić A, Radović I, Karbunar L, Despoja V, Mišković ZL. Wake effect in interactions of ions with graphene-sapphire-graphene structure. in COST Action CA15107 : Final Multicomp meeting : Book of Abstracts. 2020;:33-33.
https://hdl.handle.net/21.15107/rcub_vinar_12676 .

Kalinić, Ana, Radović, Ivan, Karbunar, Lazar, Despoja, Vito, Mišković, Zoran L., "Wake effect in interactions of ions with graphene-sapphire-graphene structure" in COST Action CA15107 : Final Multicomp meeting : Book of Abstracts (2020):33-33,
https://hdl.handle.net/21.15107/rcub_vinar_12676 .

TY  - CONF
AU  - Radović, Ivan
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12704
PB  - Italy : University of Naples Federico II
C3  - International Conference on Computational Materials Science for Nanoscale Modelling : COST Action CA18234 meeting : Book of Abstracts
T1  - Theoretical modeling of experimental EELS data for supported and free-standing graphene
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12704
ER  - 

@conference{
author = "Radović, Ivan",
year = "2020",
publisher = "Italy : University of Naples Federico II",
journal = "International Conference on Computational Materials Science for Nanoscale Modelling : COST Action CA18234 meeting : Book of Abstracts",
title = "Theoretical modeling of experimental EELS data for supported and free-standing graphene",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12704"
}

Radović, I.. (2020). Theoretical modeling of experimental EELS data for supported and free-standing graphene. in International Conference on Computational Materials Science for Nanoscale Modelling : COST Action CA18234 meeting : Book of Abstracts
Italy : University of Naples Federico II..
https://hdl.handle.net/21.15107/rcub_vinar_12704

Radović I. Theoretical modeling of experimental EELS data for supported and free-standing graphene. in International Conference on Computational Materials Science for Nanoscale Modelling : COST Action CA18234 meeting : Book of Abstracts. 2020;.
https://hdl.handle.net/21.15107/rcub_vinar_12704 .

Radović, Ivan, "Theoretical modeling of experimental EELS data for supported and free-standing graphene" in International Conference on Computational Materials Science for Nanoscale Modelling : COST Action CA18234 meeting : Book of Abstracts (2020),
https://hdl.handle.net/21.15107/rcub_vinar_12704 .

TY  - JOUR
AU  - He, Xian-Long
AU  - Zhang, Ying-Ying
AU  - Mišković, Zoran L.
AU  - Radović, Ivan
AU  - Li, Chun-Zhi
AU  - Song, Yuan-Hong
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8477
AB  - Abstract: A two-component hydrodynamic model is used to investigate low-energy plasmon excitations within the K and K′ valleys of the π electron bands in doped graphene on a dielectric substrate by a slow charged particle moving parallel to the graphene in the presence of a strain-induced pseudomagnetic field in graphene. Calculations of the stopping and the image forces on the moving charge, as well as of the total electrostatic potential in the plane of graphene are performed. The simulation results indicate that the valley polarization of electrons in graphene resulting from the pseudomagnetic field and the electrostatic coupling between graphene and the supporting substrate both have important impact on the stopping and the image forces, affecting the maximum values and the peak positions of those forces, as well as the velocity threshold for the plasmon excitation. In addition, we also study the dependence of the amplitude and period of the wake potential oscillations on the pseudomagnetic field strength, the gap size between graphene and substrate, as well as the incident particle speed. In particular, our results show that the pseudomagnetic field exerts quite strong influence on the period of the wake potential oscillations at the above-threshold particle speeds, especially for small graphene-substrate gap sizes. Graphical abstract: [Figure not available: see fulltext.] © 2020, EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature.
T2  - European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics
T1  - Interactions of moving charge with supported graphene in the presence of strain-induced pseudomagnetic field
VL  - 74
IS  - 1
SP  - 18
DO  - 10.1140/epjd/e2019-100450-1
ER  - 

@article{
author = "He, Xian-Long and Zhang, Ying-Ying and Mišković, Zoran L. and Radović, Ivan and Li, Chun-Zhi and Song, Yuan-Hong",
year = "2020",
abstract = "Abstract: A two-component hydrodynamic model is used to investigate low-energy plasmon excitations within the K and K′ valleys of the π electron bands in doped graphene on a dielectric substrate by a slow charged particle moving parallel to the graphene in the presence of a strain-induced pseudomagnetic field in graphene. Calculations of the stopping and the image forces on the moving charge, as well as of the total electrostatic potential in the plane of graphene are performed. The simulation results indicate that the valley polarization of electrons in graphene resulting from the pseudomagnetic field and the electrostatic coupling between graphene and the supporting substrate both have important impact on the stopping and the image forces, affecting the maximum values and the peak positions of those forces, as well as the velocity threshold for the plasmon excitation. In addition, we also study the dependence of the amplitude and period of the wake potential oscillations on the pseudomagnetic field strength, the gap size between graphene and substrate, as well as the incident particle speed. In particular, our results show that the pseudomagnetic field exerts quite strong influence on the period of the wake potential oscillations at the above-threshold particle speeds, especially for small graphene-substrate gap sizes. Graphical abstract: [Figure not available: see fulltext.] © 2020, EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature.",
journal = "European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics",
title = "Interactions of moving charge with supported graphene in the presence of strain-induced pseudomagnetic field",
volume = "74",
number = "1",
pages = "18",
doi = "10.1140/epjd/e2019-100450-1"
}

He, X., Zhang, Y., Mišković, Z. L., Radović, I., Li, C.,& Song, Y.. (2020). Interactions of moving charge with supported graphene in the presence of strain-induced pseudomagnetic field. in European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics, 74(1), 18.
https://doi.org/10.1140/epjd/e2019-100450-1

He X, Zhang Y, Mišković ZL, Radović I, Li C, Song Y. Interactions of moving charge with supported graphene in the presence of strain-induced pseudomagnetic field. in European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics. 2020;74(1):18.
doi:10.1140/epjd/e2019-100450-1 .

He, Xian-Long, Zhang, Ying-Ying, Mišković, Zoran L., Radović, Ivan, Li, Chun-Zhi, Song, Yuan-Hong, "Interactions of moving charge with supported graphene in the presence of strain-induced pseudomagnetic field" in European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics, 74, no. 1 (2020):18,
https://doi.org/10.1140/epjd/e2019-100450-1 . .

TY  - JOUR
AU  - Despoja, Vito
AU  - Radović, Ivan
AU  - Politano, Antonio
AU  - Mišković, Zoran L.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8953
AB  - The excitation spectrum in the region of the intraband (Dirac plasmon) and interband ( π plasmon) plasmons in graphene/Pt-skin terminated Pt 3 Ni(111) is reproduced by using an ab-initio method and an empirical model. The results of both methods are compared with experimental data. We discover that metallic screening by the Pt layer converts the square-root dispersion of the Dirac plasmon into a linear acoustic-like plasmon dispersion. In the long-wavelength limit, the Pt d electron excitations completely quench the π plasmon in graphene at about 4.1 eV, that is replaced by a broad peak at about 6 eV. Owing to a rather large graphene/Pt-skin separation (≈3.3 Å), the graphene/Pt-skin hybridization becomes weak at larger wave vectors, so that the π plasmon is recovered with a dispersion as in a free-standing graphene.
T2  - Nanomaterials
T1  - Insights on the Excitation Spectrum of Graphene Contacted with a Pt Skin
VL  - 10
IS  - 4
SP  - 703
DO  - 10.3390/nano10040703
ER  - 

@article{
author = "Despoja, Vito and Radović, Ivan and Politano, Antonio and Mišković, Zoran L.",
year = "2020",
abstract = "The excitation spectrum in the region of the intraband (Dirac plasmon) and interband ( π plasmon) plasmons in graphene/Pt-skin terminated Pt 3 Ni(111) is reproduced by using an ab-initio method and an empirical model. The results of both methods are compared with experimental data. We discover that metallic screening by the Pt layer converts the square-root dispersion of the Dirac plasmon into a linear acoustic-like plasmon dispersion. In the long-wavelength limit, the Pt d electron excitations completely quench the π plasmon in graphene at about 4.1 eV, that is replaced by a broad peak at about 6 eV. Owing to a rather large graphene/Pt-skin separation (≈3.3 Å), the graphene/Pt-skin hybridization becomes weak at larger wave vectors, so that the π plasmon is recovered with a dispersion as in a free-standing graphene.",
journal = "Nanomaterials",
title = "Insights on the Excitation Spectrum of Graphene Contacted with a Pt Skin",
volume = "10",
number = "4",
pages = "703",
doi = "10.3390/nano10040703"
}

Despoja, V., Radović, I., Politano, A.,& Mišković, Z. L.. (2020). Insights on the Excitation Spectrum of Graphene Contacted with a Pt Skin. in Nanomaterials, 10(4), 703.
https://doi.org/10.3390/nano10040703

Despoja V, Radović I, Politano A, Mišković ZL. Insights on the Excitation Spectrum of Graphene Contacted with a Pt Skin. in Nanomaterials. 2020;10(4):703.
doi:10.3390/nano10040703 .

Despoja, Vito, Radović, Ivan, Politano, Antonio, Mišković, Zoran L., "Insights on the Excitation Spectrum of Graphene Contacted with a Pt Skin" in Nanomaterials, 10, no. 4 (2020):703,
https://doi.org/10.3390/nano10040703 . .

TY  - CONF
AU  - Kalinić, Ana
AU  - Radović, Ivan
AU  - Despoja, Vito
AU  - Karbunar, Lazar
AU  - Mišković, Zoran L.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12679
AB  - We investigate the wake potential of different hybrid modes in the sy1-Al2O3-sy2 composites induced by charged particle moving parallel to the structure, as depicted in FIG. 1. This will be attained by exposing any wake patterns of the electrostatic potential in the surface closest to the incident particle. The three methods used in acquiring the effective dielectric function of the structure are based on the massless Dirac fermions (MDF), the extended hydrodynamic (eHD) model, and the ab initio approach. It is shown that in the low velocity regime (below graphene’s Fermi velocity, vF) transverse optical (TO) phonons in the Al2O3 layer give dominant contribution to the wake potential. In the intermediate velocity regime (above vF) it is the hybridized plasmon-TO phonon modes on both surfaces that give rise to the wake potential with hybridized Dirac plasmons giving the dominant contribution. For the high velocities (well above vF) only the symmetric hybridized Dirac plasmons are excited by the charged particle. It was found that ab initio approach agrees well with the MDF method at low and intermediate velocities for the pristine and doped graphene, and with eHD method at high velocities for pristine graphene layer
C3  - SFKM : 20. Simpozijum fizike kondenzovane materije = SCMP : the 20th Symposium on condensed matter physics : Book of abstracts
T1  - Wake potential in graphene-sapphire-graphene composite systems
SP  - 43
EP  - 43
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12679
ER  - 

@conference{
author = "Kalinić, Ana and Radović, Ivan and Despoja, Vito and Karbunar, Lazar and Mišković, Zoran L.",
year = "2019",
abstract = "We investigate the wake potential of different hybrid modes in the sy1-Al2O3-sy2 composites induced by charged particle moving parallel to the structure, as depicted in FIG. 1. This will be attained by exposing any wake patterns of the electrostatic potential in the surface closest to the incident particle. The three methods used in acquiring the effective dielectric function of the structure are based on the massless Dirac fermions (MDF), the extended hydrodynamic (eHD) model, and the ab initio approach. It is shown that in the low velocity regime (below graphene’s Fermi velocity, vF) transverse optical (TO) phonons in the Al2O3 layer give dominant contribution to the wake potential. In the intermediate velocity regime (above vF) it is the hybridized plasmon-TO phonon modes on both surfaces that give rise to the wake potential with hybridized Dirac plasmons giving the dominant contribution. For the high velocities (well above vF) only the symmetric hybridized Dirac plasmons are excited by the charged particle. It was found that ab initio approach agrees well with the MDF method at low and intermediate velocities for the pristine and doped graphene, and with eHD method at high velocities for pristine graphene layer",
journal = "SFKM : 20. Simpozijum fizike kondenzovane materije = SCMP : the 20th Symposium on condensed matter physics : Book of abstracts",
title = "Wake potential in graphene-sapphire-graphene composite systems",
pages = "43-43",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12679"
}

Kalinić, A., Radović, I., Despoja, V., Karbunar, L.,& Mišković, Z. L.. (2019). Wake potential in graphene-sapphire-graphene composite systems. in SFKM : 20. Simpozijum fizike kondenzovane materije = SCMP : the 20th Symposium on condensed matter physics : Book of abstracts, 43-43.
https://hdl.handle.net/21.15107/rcub_vinar_12679

Kalinić A, Radović I, Despoja V, Karbunar L, Mišković ZL. Wake potential in graphene-sapphire-graphene composite systems. in SFKM : 20. Simpozijum fizike kondenzovane materije = SCMP : the 20th Symposium on condensed matter physics : Book of abstracts. 2019;:43-43.
https://hdl.handle.net/21.15107/rcub_vinar_12679 .

Kalinić, Ana, Radović, Ivan, Despoja, Vito, Karbunar, Lazar, Mišković, Zoran L., "Wake potential in graphene-sapphire-graphene composite systems" in SFKM : 20. Simpozijum fizike kondenzovane materije = SCMP : the 20th Symposium on condensed matter physics : Book of abstracts (2019):43-43,
https://hdl.handle.net/21.15107/rcub_vinar_12679 .

TY  - CONF
AU  - Radović, Ivan
AU  - Despoja, Vito
AU  - Karbunar, Lazar
AU  - Mišković, Zoran
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12707
AB  - We study the wake effect induced by an external charged particle which moves above various sy1-Al2O3-sy2 composites, where syi (i=1,2) may be vacuum, pristine (undoped) or doped graphene. The polarization functions of graphene sheets are obtained using two approaches within the random phase approximation [1]: an ab initio method and a method based on the massless Dirac fermion approximation. The dynamic response of the layer of Al2O3 (sapphire) is described by a dielectric function consisting of several Lorentzian terms [1]. We evaluate the total electrostatic potential in the plane of the upper graphene sheet (the wake potential). It is shown that in the low velocity limit (below a velocity threshold for the wake given by the Fermi speed of graphene) the charged particle excites only the transverse optical (TO) phonons in the Al2O3 slab and only those phonons contribute to the wake potential. It is also shown that the wake potential is only sensitive on the upper system sy2 such that if sy2 is vacuum then TO phonons give intensive oscillations which are strongly reduced if sy2 is graphene.
C3  - COST Action CA15107 meeting : Multicomp Multi-Functional Nano-Carbon Composite Materials Network : Aveiro Spring Meeting : Book of abstracts
T1  - Wake potential in a graphene-sapphire-graphene structure
SP  - 79
EP  - 79
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12707
ER  - 

@conference{
author = "Radović, Ivan and Despoja, Vito and Karbunar, Lazar and Mišković, Zoran",
year = "2019",
abstract = "We study the wake effect induced by an external charged particle which moves above various sy1-Al2O3-sy2 composites, where syi (i=1,2) may be vacuum, pristine (undoped) or doped graphene. The polarization functions of graphene sheets are obtained using two approaches within the random phase approximation [1]: an ab initio method and a method based on the massless Dirac fermion approximation. The dynamic response of the layer of Al2O3 (sapphire) is described by a dielectric function consisting of several Lorentzian terms [1]. We evaluate the total electrostatic potential in the plane of the upper graphene sheet (the wake potential). It is shown that in the low velocity limit (below a velocity threshold for the wake given by the Fermi speed of graphene) the charged particle excites only the transverse optical (TO) phonons in the Al2O3 slab and only those phonons contribute to the wake potential. It is also shown that the wake potential is only sensitive on the upper system sy2 such that if sy2 is vacuum then TO phonons give intensive oscillations which are strongly reduced if sy2 is graphene.",
journal = "COST Action CA15107 meeting : Multicomp Multi-Functional Nano-Carbon Composite Materials Network : Aveiro Spring Meeting : Book of abstracts",
title = "Wake potential in a graphene-sapphire-graphene structure",
pages = "79-79",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12707"
}

Radović, I., Despoja, V., Karbunar, L.,& Mišković, Z.. (2019). Wake potential in a graphene-sapphire-graphene structure. in COST Action CA15107 meeting : Multicomp Multi-Functional Nano-Carbon Composite Materials Network : Aveiro Spring Meeting : Book of abstracts, 79-79.
https://hdl.handle.net/21.15107/rcub_vinar_12707

Radović I, Despoja V, Karbunar L, Mišković Z. Wake potential in a graphene-sapphire-graphene structure. in COST Action CA15107 meeting : Multicomp Multi-Functional Nano-Carbon Composite Materials Network : Aveiro Spring Meeting : Book of abstracts. 2019;:79-79.
https://hdl.handle.net/21.15107/rcub_vinar_12707 .

Radović, Ivan, Despoja, Vito, Karbunar, Lazar, Mišković, Zoran, "Wake potential in a graphene-sapphire-graphene structure" in COST Action CA15107 meeting : Multicomp Multi-Functional Nano-Carbon Composite Materials Network : Aveiro Spring Meeting : Book of abstracts (2019):79-79,
https://hdl.handle.net/21.15107/rcub_vinar_12707 .

TY  - CONF
AU  - Radović, Ivan
AU  - Despoja, Vito
AU  - Mišković, Zoran L.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12708
AB  - We present an analytical modeling of the experimental electron energyloss(EEL)spectroscopy data for free-standing graphene obtained by scanning transmission electron microscope using a two-dimensional, two-fluid extended hydrodynamic (eHD) model and an ab initio method [1]. An analytical expression for the probability density for energyloss of fast electrons traversing graphene under normal incidence is derived in the long wavelength limit in terms of an arbitrary form of the conductivity of graphene given in the local, i.e., frequencydependent form. The calculated probability density from both theoretical modelsis directlycompared with the EEL spectra from three independent experiments [2-4] and we find verygood agreement, especially in the case of the eHD model. Furthermore, we point out that the method of subtraction of the zero-loss peak from the experimental EEL spectra maystronglyaffect agreement with analytical models.
C3  - Autumn Prague Meeting : COST Action CA15107 meeting : Book of Abstracts
T1  - Analytical modeling of experimental EELS data for free-standing graphene
SP  - 77
EP  - 77
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12708
ER  - 

@conference{
author = "Radović, Ivan and Despoja, Vito and Mišković, Zoran L.",
year = "2019",
abstract = "We present an analytical modeling of the experimental electron energyloss(EEL)spectroscopy data for free-standing graphene obtained by scanning transmission electron microscope using a two-dimensional, two-fluid extended hydrodynamic (eHD) model and an ab initio method [1]. An analytical expression for the probability density for energyloss of fast electrons traversing graphene under normal incidence is derived in the long wavelength limit in terms of an arbitrary form of the conductivity of graphene given in the local, i.e., frequencydependent form. The calculated probability density from both theoretical modelsis directlycompared with the EEL spectra from three independent experiments [2-4] and we find verygood agreement, especially in the case of the eHD model. Furthermore, we point out that the method of subtraction of the zero-loss peak from the experimental EEL spectra maystronglyaffect agreement with analytical models.",
journal = "Autumn Prague Meeting : COST Action CA15107 meeting : Book of Abstracts",
title = "Analytical modeling of experimental EELS data for free-standing graphene",
pages = "77-77",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12708"
}

Radović, I., Despoja, V.,& Mišković, Z. L.. (2019). Analytical modeling of experimental EELS data for free-standing graphene. in Autumn Prague Meeting : COST Action CA15107 meeting : Book of Abstracts, 77-77.
https://hdl.handle.net/21.15107/rcub_vinar_12708

Radović I, Despoja V, Mišković ZL. Analytical modeling of experimental EELS data for free-standing graphene. in Autumn Prague Meeting : COST Action CA15107 meeting : Book of Abstracts. 2019;:77-77.
https://hdl.handle.net/21.15107/rcub_vinar_12708 .

Radović, Ivan, Despoja, Vito, Mišković, Zoran L., "Analytical modeling of experimental EELS data for free-standing graphene" in Autumn Prague Meeting : COST Action CA15107 meeting : Book of Abstracts (2019):77-77,
https://hdl.handle.net/21.15107/rcub_vinar_12708 .

TY  - JOUR
AU  - Despoja, Vito
AU  - Radović, Ivan
AU  - Karbunar, Lazar
AU  - Kalinić, Ana
AU  - Mišković, Zoran L.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8595
AB  - We study the wake potential produced by an external charged particle that moves parallel to various sy1-Al2O3-sy2 sandwich-like composites, where the system syi (with i=1,2) may be vacuum, pristine graphene, or doped graphene. The effective dielectric function of the composites is obtained using three complementary methods for graphene's electronic response, based on the massless Dirac fermions (MDF) method, the extended hydrodynamic (eHD) model, and the ab initio approach. Three velocity regimes are explored with respect to the threshold for excitations of the Dirac plasmon in graphene, given by its Fermi velocity vF. In the low-velocity regime (below vF), only the transverse optical (TO) phonons in the Al2O3 layer contribute to the wake potential in the surface with sy2 (which is nearest to the charged particle), in a manner that is only sensitive to the composition of that system: if sy2 is vacuum, the TO phonons give rise to intense oscillations in the wake potential, which are strongly suppressed if sy2 is pristine or doped graphene. For intermediate velocities (above vF), the hybridized plasmon-TO phonon modes on both surfaces contribute to the wake potential in the surface with sy2, with the most dominant contribution coming from the hybridized Dirac-like plasmonic modes. In the high-velocity regime (well above vF), the highest-lying hybridized Dirac plasmon gives the dominant contribution to the wake potential, which exhibits a typical V-shaped wave-front pattern that lags behind the charged particle. It is found that the MDF method agrees very well with the results of the ab initio method for small and intermediate velocities. However, in the high-velocity regime, the high-energy π plasmon in graphene introduces new features in the wake potential in the form of fast oscillations, just behind the charged particle. Those oscillations in the wake potential are well described by both the eHD and the ab initio method, proving that the π plasmon indeed behaves as a collective mode.
T2  - Physical Review B
T1  - Wake potential in graphene-insulator-graphene composite systems
VL  - 100
IS  - 3
SP  - 035443
DO  - 10.1103/PhysRevB.100.035443
ER  - 

@article{
author = "Despoja, Vito and Radović, Ivan and Karbunar, Lazar and Kalinić, Ana and Mišković, Zoran L.",
year = "2019",
abstract = "We study the wake potential produced by an external charged particle that moves parallel to various sy1-Al2O3-sy2 sandwich-like composites, where the system syi (with i=1,2) may be vacuum, pristine graphene, or doped graphene. The effective dielectric function of the composites is obtained using three complementary methods for graphene's electronic response, based on the massless Dirac fermions (MDF) method, the extended hydrodynamic (eHD) model, and the ab initio approach. Three velocity regimes are explored with respect to the threshold for excitations of the Dirac plasmon in graphene, given by its Fermi velocity vF. In the low-velocity regime (below vF), only the transverse optical (TO) phonons in the Al2O3 layer contribute to the wake potential in the surface with sy2 (which is nearest to the charged particle), in a manner that is only sensitive to the composition of that system: if sy2 is vacuum, the TO phonons give rise to intense oscillations in the wake potential, which are strongly suppressed if sy2 is pristine or doped graphene. For intermediate velocities (above vF), the hybridized plasmon-TO phonon modes on both surfaces contribute to the wake potential in the surface with sy2, with the most dominant contribution coming from the hybridized Dirac-like plasmonic modes. In the high-velocity regime (well above vF), the highest-lying hybridized Dirac plasmon gives the dominant contribution to the wake potential, which exhibits a typical V-shaped wave-front pattern that lags behind the charged particle. It is found that the MDF method agrees very well with the results of the ab initio method for small and intermediate velocities. However, in the high-velocity regime, the high-energy π plasmon in graphene introduces new features in the wake potential in the form of fast oscillations, just behind the charged particle. Those oscillations in the wake potential are well described by both the eHD and the ab initio method, proving that the π plasmon indeed behaves as a collective mode.",
journal = "Physical Review B",
title = "Wake potential in graphene-insulator-graphene composite systems",
volume = "100",
number = "3",
pages = "035443",
doi = "10.1103/PhysRevB.100.035443"
}

Despoja, V., Radović, I., Karbunar, L., Kalinić, A.,& Mišković, Z. L.. (2019). Wake potential in graphene-insulator-graphene composite systems. in Physical Review B, 100(3), 035443.
https://doi.org/10.1103/PhysRevB.100.035443

Despoja V, Radović I, Karbunar L, Kalinić A, Mišković ZL. Wake potential in graphene-insulator-graphene composite systems. in Physical Review B. 2019;100(3):035443.
doi:10.1103/PhysRevB.100.035443 .

Despoja, Vito, Radović, Ivan, Karbunar, Lazar, Kalinić, Ana, Mišković, Zoran L., "Wake potential in graphene-insulator-graphene composite systems" in Physical Review B, 100, no. 3 (2019):035443,
https://doi.org/10.1103/PhysRevB.100.035443 . .

TY  - CONF
AU  - Despoja, Vito
AU  - Radović, Ivan
AU  - Karbunar, Lazar
AU  - Mišković, Zoran
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12665
AB  - We study the wake effect due to excitation of a plasmon-phonon hybrid mode in a sandwich-like structure consisting of two doped graphene sheets, separated by a layer of Al2O3 (sapphire), which is induced by an external charged particle moving parallel to the structure.
PB  - University of Belgrade : Faculty of Physics
C3  - SPIG 2018 : 29th Summer School and International Symposium on the Physics of Ionized Gases : Contributed papers & abstracts of invited lectures, topical invited lectures, progress reports and workshop lectures
T1  - Wake effect due to excitation of plasmon-phonon hybrid modes in a graphene-sapphire-graphene structure by a moving charge
SP  - 82
EP  - 85
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12665
ER  - 

@conference{
author = "Despoja, Vito and Radović, Ivan and Karbunar, Lazar and Mišković, Zoran",
year = "2018",
abstract = "We study the wake effect due to excitation of a plasmon-phonon hybrid mode in a sandwich-like structure consisting of two doped graphene sheets, separated by a layer of Al2O3 (sapphire), which is induced by an external charged particle moving parallel to the structure.",
publisher = "University of Belgrade : Faculty of Physics",
journal = "SPIG 2018 : 29th Summer School and International Symposium on the Physics of Ionized Gases : Contributed papers & abstracts of invited lectures, topical invited lectures, progress reports and workshop lectures",
title = "Wake effect due to excitation of plasmon-phonon hybrid modes in a graphene-sapphire-graphene structure by a moving charge",
pages = "82-85",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12665"
}

Despoja, V., Radović, I., Karbunar, L.,& Mišković, Z.. (2018). Wake effect due to excitation of plasmon-phonon hybrid modes in a graphene-sapphire-graphene structure by a moving charge. in SPIG 2018 : 29th Summer School and International Symposium on the Physics of Ionized Gases : Contributed papers & abstracts of invited lectures, topical invited lectures, progress reports and workshop lectures
University of Belgrade : Faculty of Physics., 82-85.
https://hdl.handle.net/21.15107/rcub_vinar_12665

Despoja V, Radović I, Karbunar L, Mišković Z. Wake effect due to excitation of plasmon-phonon hybrid modes in a graphene-sapphire-graphene structure by a moving charge. in SPIG 2018 : 29th Summer School and International Symposium on the Physics of Ionized Gases : Contributed papers & abstracts of invited lectures, topical invited lectures, progress reports and workshop lectures. 2018;:82-85.
https://hdl.handle.net/21.15107/rcub_vinar_12665 .

Despoja, Vito, Radović, Ivan, Karbunar, Lazar, Mišković, Zoran, "Wake effect due to excitation of plasmon-phonon hybrid modes in a graphene-sapphire-graphene structure by a moving charge" in SPIG 2018 : 29th Summer School and International Symposium on the Physics of Ionized Gases : Contributed papers & abstracts of invited lectures, topical invited lectures, progress reports and workshop lectures (2018):82-85,
https://hdl.handle.net/21.15107/rcub_vinar_12665 .

TY  - CONF
AU  - Politano, A.
AU  - Radović, Ivan
AU  - Borka, Duško
AU  - Mišković, Zoran L.
AU  - Chiarello, G.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12675
AB  - We present a theoretical modeling of the electron energy loss spectroscopy data for monolayer graphene supported by Pt(111), Ru(0001), and Ni(111) substrates. In order to reproduce the experimental loss function, we have used a two-dimensional, two-fluid hydrodynamic model for inter-band transitions of graphene’s π and σ electrons and an empirical Drude-Lorentz model in the local approximation for metal substrates. The agreement between the theoretical curves and the experimental data is very good in the cases of graphene supported by Pt and Ru substrates. Conversely, the agreement is less satisfactory for the case of graphene/Ni, presumably due to the strong hybridization between the π states of graphene and the d bands of Ni, which is not accounted for in the model.
PB  - Vilnius, Lithuania : Vilnius University, Physics Faculty
C3  - COST Action CA15107 meeting : “Multi-functional Nano-Carbon Composite Materials Network“ : Programme and abstracts
T1  - Theoretical modeling of experimental EELS data for monolayer graphene supported by different metal substrates
SP  - 31
EP  - 31
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12675
ER  - 

@conference{
author = "Politano, A. and Radović, Ivan and Borka, Duško and Mišković, Zoran L. and Chiarello, G.",
year = "2018",
abstract = "We present a theoretical modeling of the electron energy loss spectroscopy data for monolayer graphene supported by Pt(111), Ru(0001), and Ni(111) substrates. In order to reproduce the experimental loss function, we have used a two-dimensional, two-fluid hydrodynamic model for inter-band transitions of graphene’s π and σ electrons and an empirical Drude-Lorentz model in the local approximation for metal substrates. The agreement between the theoretical curves and the experimental data is very good in the cases of graphene supported by Pt and Ru substrates. Conversely, the agreement is less satisfactory for the case of graphene/Ni, presumably due to the strong hybridization between the π states of graphene and the d bands of Ni, which is not accounted for in the model.",
publisher = "Vilnius, Lithuania : Vilnius University, Physics Faculty",
journal = "COST Action CA15107 meeting : “Multi-functional Nano-Carbon Composite Materials Network“ : Programme and abstracts",
title = "Theoretical modeling of experimental EELS data for monolayer graphene supported by different metal substrates",
pages = "31-31",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12675"
}

Politano, A., Radović, I., Borka, D., Mišković, Z. L.,& Chiarello, G.. (2018). Theoretical modeling of experimental EELS data for monolayer graphene supported by different metal substrates. in COST Action CA15107 meeting : “Multi-functional Nano-Carbon Composite Materials Network“ : Programme and abstracts
Vilnius, Lithuania : Vilnius University, Physics Faculty., 31-31.
https://hdl.handle.net/21.15107/rcub_vinar_12675

Politano A, Radović I, Borka D, Mišković ZL, Chiarello G. Theoretical modeling of experimental EELS data for monolayer graphene supported by different metal substrates. in COST Action CA15107 meeting : “Multi-functional Nano-Carbon Composite Materials Network“ : Programme and abstracts. 2018;:31-31.
https://hdl.handle.net/21.15107/rcub_vinar_12675 .

Politano, A., Radović, Ivan, Borka, Duško, Mišković, Zoran L., Chiarello, G., "Theoretical modeling of experimental EELS data for monolayer graphene supported by different metal substrates" in COST Action CA15107 meeting : “Multi-functional Nano-Carbon Composite Materials Network“ : Programme and abstracts (2018):31-31,
https://hdl.handle.net/21.15107/rcub_vinar_12675 .

TY  - CONF
AU  - Radović, Ivan
AU  - Despoja, Vito
AU  - Karbunar, Lazar
AU  - Mišković, Zoran
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12706
AB  - We study the wake effect due to excitation of a plasmon-phonon hybrid mode in a sandwich-like structure consisting of two doped graphene sheets, separated by a layer of Al2O3 (sapphire), which is induced by an external charged particle moving parallel to the structure. The response function of each graphene is obtained using two approaches within the random phase approximation: an ab initio method that includes all electronic bands in graphene and a computationally less demanding method based on the massless Dirac fermion (MDF) approximation for the low-energy excitations of electrons in the π bands. The response of the sapphire layer is described by a dielectric function consisting of several Lorentzian terms. We evaluate the total electrostatic potential in the plane of the upper graphene sheet for a particle moving at the sub-threshold speed for the wake effect in a single, free graphene. We show that, when the space between graphene sheets is air, there is only a sharp, somewhat asymmetric peak in the potential at the position of the particle. On the other hand, when the space is filled with sapphire, there is a prominent wake pattern in the potential behind the particle resulting from a low-frequency plasmon-phonon mode. It can be noted that the analytical MDF model reproduces the overall shape and the period of quasi-oscillations in the wake potential obtained from the ab initio calculations.
C3  - Bucharest CA 15107 Fall Meeting : Multi-Functional Nano-Carbon Composite Materials : Programme and Abstract Book
T1  - Wake effect in the interaction of an external charged particle with a graphene-sapphire-graphene structure due to excitation of plasmon-phonon hybrid modes
SP  - 59
EP  - 59
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12706
ER  - 

@conference{
author = "Radović, Ivan and Despoja, Vito and Karbunar, Lazar and Mišković, Zoran",
year = "2018",
abstract = "We study the wake effect due to excitation of a plasmon-phonon hybrid mode in a sandwich-like structure consisting of two doped graphene sheets, separated by a layer of Al2O3 (sapphire), which is induced by an external charged particle moving parallel to the structure. The response function of each graphene is obtained using two approaches within the random phase approximation: an ab initio method that includes all electronic bands in graphene and a computationally less demanding method based on the massless Dirac fermion (MDF) approximation for the low-energy excitations of electrons in the π bands. The response of the sapphire layer is described by a dielectric function consisting of several Lorentzian terms. We evaluate the total electrostatic potential in the plane of the upper graphene sheet for a particle moving at the sub-threshold speed for the wake effect in a single, free graphene. We show that, when the space between graphene sheets is air, there is only a sharp, somewhat asymmetric peak in the potential at the position of the particle. On the other hand, when the space is filled with sapphire, there is a prominent wake pattern in the potential behind the particle resulting from a low-frequency plasmon-phonon mode. It can be noted that the analytical MDF model reproduces the overall shape and the period of quasi-oscillations in the wake potential obtained from the ab initio calculations.",
journal = "Bucharest CA 15107 Fall Meeting : Multi-Functional Nano-Carbon Composite Materials : Programme and Abstract Book",
title = "Wake effect in the interaction of an external charged particle with a graphene-sapphire-graphene structure due to excitation of plasmon-phonon hybrid modes",
pages = "59-59",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12706"
}

Radović, I., Despoja, V., Karbunar, L.,& Mišković, Z.. (2018). Wake effect in the interaction of an external charged particle with a graphene-sapphire-graphene structure due to excitation of plasmon-phonon hybrid modes. in Bucharest CA 15107 Fall Meeting : Multi-Functional Nano-Carbon Composite Materials : Programme and Abstract Book, 59-59.
https://hdl.handle.net/21.15107/rcub_vinar_12706

Radović I, Despoja V, Karbunar L, Mišković Z. Wake effect in the interaction of an external charged particle with a graphene-sapphire-graphene structure due to excitation of plasmon-phonon hybrid modes. in Bucharest CA 15107 Fall Meeting : Multi-Functional Nano-Carbon Composite Materials : Programme and Abstract Book. 2018;:59-59.
https://hdl.handle.net/21.15107/rcub_vinar_12706 .

Radović, Ivan, Despoja, Vito, Karbunar, Lazar, Mišković, Zoran, "Wake effect in the interaction of an external charged particle with a graphene-sapphire-graphene structure due to excitation of plasmon-phonon hybrid modes" in Bucharest CA 15107 Fall Meeting : Multi-Functional Nano-Carbon Composite Materials : Programme and Abstract Book (2018):59-59,
https://hdl.handle.net/21.15107/rcub_vinar_12706 .

TY  - JOUR
AU  - Đorđević, Tijana
AU  - Radović, Ivan
AU  - Despoja, Vito
AU  - Lyon, Keenan
AU  - Borka, Duško
AU  - Mišković, Zoran L.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1831
AB  - We present an analytical modeling of the electron energy loss (EEL) spectroscopy data for free-standing graphene obtained by scanning transmission electron microscope. The probability density for energy loss of fast electrons traversing graphene under normal incidence is evaluated using an optical approximation based on the conductivity of graphene given in the local, i.e., frequency-dependent form derived by both a two-dimensional, two-fluid extended hydrodynamic (eHD) model and an ab initio method. We compare the results for the real and imaginary parts of the optical conductivity in graphene obtained by these two methods. The calculated probability density is directly compared with the EEL spectra from three independent experiments and we find very good agreement, especially in the case of the eHD model. Furthermore, we point out that the subtraction of the zero-loss peak from the experimental EEL spectra has a strong influence on the analytical model for the EEL spectroscopy data. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Ultramicroscopy
T1  - Analytical modeling of electron energy loss spectroscopy of graphene: Ab initio study versus extended hydrodynamic model
VL  - 184
SP  - 134
EP  - 142
DO  - 10.1016/j.ultramic.2017.08.014
ER  - 

@article{
author = "Đorđević, Tijana and Radović, Ivan and Despoja, Vito and Lyon, Keenan and Borka, Duško and Mišković, Zoran L.",
year = "2018",
abstract = "We present an analytical modeling of the electron energy loss (EEL) spectroscopy data for free-standing graphene obtained by scanning transmission electron microscope. The probability density for energy loss of fast electrons traversing graphene under normal incidence is evaluated using an optical approximation based on the conductivity of graphene given in the local, i.e., frequency-dependent form derived by both a two-dimensional, two-fluid extended hydrodynamic (eHD) model and an ab initio method. We compare the results for the real and imaginary parts of the optical conductivity in graphene obtained by these two methods. The calculated probability density is directly compared with the EEL spectra from three independent experiments and we find very good agreement, especially in the case of the eHD model. Furthermore, we point out that the subtraction of the zero-loss peak from the experimental EEL spectra has a strong influence on the analytical model for the EEL spectroscopy data. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Ultramicroscopy",
title = "Analytical modeling of electron energy loss spectroscopy of graphene: Ab initio study versus extended hydrodynamic model",
volume = "184",
pages = "134-142",
doi = "10.1016/j.ultramic.2017.08.014"
}

Đorđević, T., Radović, I., Despoja, V., Lyon, K., Borka, D.,& Mišković, Z. L.. (2018). Analytical modeling of electron energy loss spectroscopy of graphene: Ab initio study versus extended hydrodynamic model. in Ultramicroscopy, 184, 134-142.
https://doi.org/10.1016/j.ultramic.2017.08.014

Đorđević T, Radović I, Despoja V, Lyon K, Borka D, Mišković ZL. Analytical modeling of electron energy loss spectroscopy of graphene: Ab initio study versus extended hydrodynamic model. in Ultramicroscopy. 2018;184:134-142.
doi:10.1016/j.ultramic.2017.08.014 .

Đorđević, Tijana, Radović, Ivan, Despoja, Vito, Lyon, Keenan, Borka, Duško, Mišković, Zoran L., "Analytical modeling of electron energy loss spectroscopy of graphene: Ab initio study versus extended hydrodynamic model" in Ultramicroscopy, 184 (2018):134-142,
https://doi.org/10.1016/j.ultramic.2017.08.014 . .

TY  - CONF
AU  - Đorđević, Tijana
AU  - Radović, Ivan
AU  - Borka, Duško
AU  - Mišković, Zoran L.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12674
AB  - We study the effects of variation in the doping density of graphene on hybridization taking place
between its Dirac plasmon and the surface optical phonon modes in a SiO2 substrate, and show that
this hybridization may be probed by a point charge that moves over graphene at a speed comparable
to graphene’s Fermi speed. Using the dielectric-response formalism within the random phase
approximation, we show that the plasmon-phonon hybridization exerts strong effects on the wake
pattern in the induced potential in the plane of graphene, as well as on the stopping and image forces
on the incident charge, in a manner that may be controlled by changing the doping density of
graphene.
PB  - Tallinn, Estonia : Tallinn University of Technology
C3  - 17th Baltic Polymer Symposium : Book of Abstracts
T1  - Probing the plasmon-phonon hybridization in supported graphene by externally moving charged particles
SP  - 72
EP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12674
ER  - 

@conference{
author = "Đorđević, Tijana and Radović, Ivan and Borka, Duško and Mišković, Zoran L.",
year = "2017",
abstract = "We study the effects of variation in the doping density of graphene on hybridization taking place
between its Dirac plasmon and the surface optical phonon modes in a SiO2 substrate, and show that
this hybridization may be probed by a point charge that moves over graphene at a speed comparable
to graphene’s Fermi speed. Using the dielectric-response formalism within the random phase
approximation, we show that the plasmon-phonon hybridization exerts strong effects on the wake
pattern in the induced potential in the plane of graphene, as well as on the stopping and image forces
on the incident charge, in a manner that may be controlled by changing the doping density of
graphene.",
publisher = "Tallinn, Estonia : Tallinn University of Technology",
journal = "17th Baltic Polymer Symposium : Book of Abstracts",
title = "Probing the plasmon-phonon hybridization in supported graphene by externally moving charged particles",
pages = "72-72",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12674"
}

Đorđević, T., Radović, I., Borka, D.,& Mišković, Z. L.. (2017). Probing the plasmon-phonon hybridization in supported graphene by externally moving charged particles. in 17th Baltic Polymer Symposium : Book of Abstracts
Tallinn, Estonia : Tallinn University of Technology., 72-72.
https://hdl.handle.net/21.15107/rcub_vinar_12674

Đorđević T, Radović I, Borka D, Mišković ZL. Probing the plasmon-phonon hybridization in supported graphene by externally moving charged particles. in 17th Baltic Polymer Symposium : Book of Abstracts. 2017;:72-72.
https://hdl.handle.net/21.15107/rcub_vinar_12674 .

Đorđević, Tijana, Radović, Ivan, Borka, Duško, Mišković, Zoran L., "Probing the plasmon-phonon hybridization in supported graphene by externally moving charged particles" in 17th Baltic Polymer Symposium : Book of Abstracts (2017):72-72,
https://hdl.handle.net/21.15107/rcub_vinar_12674 .