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  - 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  - 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  - 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 .