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  - 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  - 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  - 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  - 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  - Kalinić, Ana
AU  - Vujisić, Miloš
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12055
AB  - Dejstvo snopova protona, alfa čestica, jona ugljenika i gvožđa na grafenski tranzistor sa efektom polja (GFET, graphene field effect transistor), u elektrodnim konfiguracijama sa gornjim i zadnjim gejtom, analizirano je pomoću Monte Karlo simulacija transporta zračenja. Energije upadnih čestica zadavane su u opsegu od 1 keV do 10 MeV. Struktura sa gornjim gejtom modelirana je slojevima Al-SiO2- grafen-Si, a sa zadnjim gejtom slojevima grafen-SiO2-Si-Al. Snopovi su usmeravani na prednju stranu tranzistora u obe elektrodne konfiguracije. Na osnovu podataka o tačkastim defektima prouzrokovanim zračenjem, dobijenih iz simulacija, izračunata je promena nejonizujućeg gubitka energije (NIEL) po dubini analiziranih struktura, kao i raspodela izmeštenih atoma i vakancija u oblasti izolatorske podloge neposredno uz grafenski monosloj. Pokazano je kako pokretljivost nosilaca naelektrisanja i slojna električna provodnost grafenskog sloja zavise od defekata formiranih u okolini ovog sloja. Identifikovani su opsezi energija upadnog zračenja za koje su očekivane promene električnih osobina GFET-a najizraženije. Cilj rada je da se dve ispitivane elektrodne konfiguracije GFET-a uporede po radijacionoj osetljivosti u modeliranim uslovima ozračenosti.
AB  - Effects of exposing GFETs (graphene field effect transistors), with top- or back-gate electrode configurations, to beams of protons, alpha particles, carbon and iron ions has been studied through Monte Carlo simulations of radiation transport. The energy of incident beams ranged from 1 keV to 10 MeV. The top-gate structure was modeled by the layers of Al-SiO2-graphene-Si, while the back-gate structure consisted of graphene-SiO2-Si-Al. The beams were incident on the front surface of the transistor in both electrode configurations. Data on point defects caused by irradiation, obtained from simulations, were used for calculating the non-ionizing energy loss (NIEL) along the depth of analyzed structures, as well as the distribution of atoms and vacancies in the region within the insulating substrate next to the graphene monolayer. It has been demonstrated how charge carrier mobility and sheet conductance of the graphene layer depend on the defects formed in the vicinity of this layer. Ranges of energies have been identified for which the incident radiation would cause greatest changes in GFET electrical properties. The aim of this paper is to draw conclusions on how the two investigated GFET electrode configurations compare against each other concerning radiation sensitivity in modeled exposure conditions.
PB  - Belgrade : ETRAN Society
C3  - ETRAN 2018 : 62. Konferencija adn IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
T1  - Analiza dejstva jonskih snopova na GFET strukture simulacijom transporta zračenja
T1  - Study of Ion-Beam Effects in GFET Structures Based on Simulations of Radiation Transport
SP  - 370
EP  - 375
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11917
ER  - 

@conference{
author = "Kalinić, Ana and Vujisić, Miloš",
year = "2018",
abstract = "Dejstvo snopova protona, alfa čestica, jona ugljenika i gvožđa na grafenski tranzistor sa efektom polja (GFET, graphene field effect transistor), u elektrodnim konfiguracijama sa gornjim i zadnjim gejtom, analizirano je pomoću Monte Karlo simulacija transporta zračenja. Energije upadnih čestica zadavane su u opsegu od 1 keV do 10 MeV. Struktura sa gornjim gejtom modelirana je slojevima Al-SiO2- grafen-Si, a sa zadnjim gejtom slojevima grafen-SiO2-Si-Al. Snopovi su usmeravani na prednju stranu tranzistora u obe elektrodne konfiguracije. Na osnovu podataka o tačkastim defektima prouzrokovanim zračenjem, dobijenih iz simulacija, izračunata je promena nejonizujućeg gubitka energije (NIEL) po dubini analiziranih struktura, kao i raspodela izmeštenih atoma i vakancija u oblasti izolatorske podloge neposredno uz grafenski monosloj. Pokazano je kako pokretljivost nosilaca naelektrisanja i slojna električna provodnost grafenskog sloja zavise od defekata formiranih u okolini ovog sloja. Identifikovani su opsezi energija upadnog zračenja za koje su očekivane promene električnih osobina GFET-a najizraženije. Cilj rada je da se dve ispitivane elektrodne konfiguracije GFET-a uporede po radijacionoj osetljivosti u modeliranim uslovima ozračenosti., Effects of exposing GFETs (graphene field effect transistors), with top- or back-gate electrode configurations, to beams of protons, alpha particles, carbon and iron ions has been studied through Monte Carlo simulations of radiation transport. The energy of incident beams ranged from 1 keV to 10 MeV. The top-gate structure was modeled by the layers of Al-SiO2-graphene-Si, while the back-gate structure consisted of graphene-SiO2-Si-Al. The beams were incident on the front surface of the transistor in both electrode configurations. Data on point defects caused by irradiation, obtained from simulations, were used for calculating the non-ionizing energy loss (NIEL) along the depth of analyzed structures, as well as the distribution of atoms and vacancies in the region within the insulating substrate next to the graphene monolayer. It has been demonstrated how charge carrier mobility and sheet conductance of the graphene layer depend on the defects formed in the vicinity of this layer. Ranges of energies have been identified for which the incident radiation would cause greatest changes in GFET electrical properties. The aim of this paper is to draw conclusions on how the two investigated GFET electrode configurations compare against each other concerning radiation sensitivity in modeled exposure conditions.",
publisher = "Belgrade : ETRAN Society",
journal = "ETRAN 2018 : 62. Konferencija adn IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book",
title = "Analiza dejstva jonskih snopova na GFET strukture simulacijom transporta zračenja, Study of Ion-Beam Effects in GFET Structures Based on Simulations of Radiation Transport",
pages = "370-375",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11917"
}

Kalinić, A.,& Vujisić, M.. (2018). Analiza dejstva jonskih snopova na GFET strukture simulacijom transporta zračenja. in ETRAN 2018 : 62. Konferencija adn IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
Belgrade : ETRAN Society., 370-375.
https://hdl.handle.net/21.15107/rcub_vinar_11917

Kalinić A, Vujisić M. Analiza dejstva jonskih snopova na GFET strukture simulacijom transporta zračenja. in ETRAN 2018 : 62. Konferencija adn IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book. 2018;:370-375.
https://hdl.handle.net/21.15107/rcub_vinar_11917 .

Kalinić, Ana, Vujisić, Miloš, "Analiza dejstva jonskih snopova na GFET strukture simulacijom transporta zračenja" in ETRAN 2018 : 62. Konferencija adn IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book (2018):370-375,
https://hdl.handle.net/21.15107/rcub_vinar_11917 .