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  - 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  - 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  - JOUR
AU  - Despoja, Vito
AU  - Đorđević, Tijana
AU  - Karbunar, Lazar
AU  - Radović, Ivan
AU  - Mišković, Zoran L.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1693
AB  - The propagator of a dynamically screened Coulomb interaction W in a sandwichlike structure consisting of two graphene layers separated by a slab of Al2O3 (or vacuum) is derived from single-layer graphene response functions and by using a local dielectric function for the bulk Al2O3. The response function of graphene is obtained using two approaches within the random phase approximation (RPA): 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 p bands. The propagator W is used to derive an expression for the effective dielectric function of our sandwich structure, which is relevant for the reflection electron energy loss spectroscopy of its surface. Focusing on the range of frequencies from THz to mid-infrared, special attention is paid to finding an accurate optical limit in the ab initio method, where the response function is expressed in terms of a frequency-dependent conductivity of graphene. It was shown that the optical limit suffices for describing hybridization between the Dirac plasmons in graphene layers and the Fuchs-Kliewer phonons in both surfaces of the Al2O3 slab, and that the spectra obtained from both the ab initio method and the MDF approximation in the optical limit agree perfectly well for wave numbers up to about 0.1 nm(-1). Going beyond the optical limit, the agreement between the full ab initio method and the MDF approximation was found to extend to wave numbers up to about 0.3 nm(-1) for doped graphene layers with the Fermi energy of 0.2 eV.
T2  - Physical Review B: Condensed Matter and Materials Physics
T1  - Ab initio study of the electron energy loss function in a graphene-sapphire-graphene composite system
VL  - 96
IS  - 7
DO  - 10.1103/PhysRevB.96.075433
ER  - 

@article{
author = "Despoja, Vito and Đorđević, Tijana and Karbunar, Lazar and Radović, Ivan and Mišković, Zoran L.",
year = "2017",
abstract = "The propagator of a dynamically screened Coulomb interaction W in a sandwichlike structure consisting of two graphene layers separated by a slab of Al2O3 (or vacuum) is derived from single-layer graphene response functions and by using a local dielectric function for the bulk Al2O3. The response function of graphene is obtained using two approaches within the random phase approximation (RPA): 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 p bands. The propagator W is used to derive an expression for the effective dielectric function of our sandwich structure, which is relevant for the reflection electron energy loss spectroscopy of its surface. Focusing on the range of frequencies from THz to mid-infrared, special attention is paid to finding an accurate optical limit in the ab initio method, where the response function is expressed in terms of a frequency-dependent conductivity of graphene. It was shown that the optical limit suffices for describing hybridization between the Dirac plasmons in graphene layers and the Fuchs-Kliewer phonons in both surfaces of the Al2O3 slab, and that the spectra obtained from both the ab initio method and the MDF approximation in the optical limit agree perfectly well for wave numbers up to about 0.1 nm(-1). Going beyond the optical limit, the agreement between the full ab initio method and the MDF approximation was found to extend to wave numbers up to about 0.3 nm(-1) for doped graphene layers with the Fermi energy of 0.2 eV.",
journal = "Physical Review B: Condensed Matter and Materials Physics",
title = "Ab initio study of the electron energy loss function in a graphene-sapphire-graphene composite system",
volume = "96",
number = "7",
doi = "10.1103/PhysRevB.96.075433"
}

Despoja, V., Đorđević, T., Karbunar, L., Radović, I.,& Mišković, Z. L.. (2017). Ab initio study of the electron energy loss function in a graphene-sapphire-graphene composite system. in Physical Review B: Condensed Matter and Materials Physics, 96(7).
https://doi.org/10.1103/PhysRevB.96.075433

Despoja V, Đorđević T, Karbunar L, Radović I, Mišković ZL. Ab initio study of the electron energy loss function in a graphene-sapphire-graphene composite system. in Physical Review B: Condensed Matter and Materials Physics. 2017;96(7).
doi:10.1103/PhysRevB.96.075433 .

Despoja, Vito, Đorđević, Tijana, Karbunar, Lazar, Radović, Ivan, Mišković, Zoran L., "Ab initio study of the electron energy loss function in a graphene-sapphire-graphene composite system" in Physical Review B: Condensed Matter and Materials Physics, 96, no. 7 (2017),
https://doi.org/10.1103/PhysRevB.96.075433 . .

TY  - CONF
AU  - Karbunar, Lazar
AU  - Borka, Duško
AU  - Radović, Ivan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7117
AB  - In this paper we investigate possibility of carbon nanotubes characterization by differentiation in spatial and angular distribution fingerprints obtained by fast ions channeling. We analyze straight single walled carbon nanotubes (SWNTs) interacting with fast ion beams. We calculate the image potential for protons moving through the four types of SWNTs at the speeds of 3 a.u.. We calculate total potential in straight carbon nanotubes. Interaction of channelled ions with nanotube electrons we calculate by linearized, two dimensional (2D), extended two-fluid hydrodynamic model. We simulate ion beams channelling through the four types of SWNTs under calculated conditions of interaction and calculate spatial and angular distributions of channelled particles what we use as method for different SWNTs characterization.
C3  - 5th Mediterranean Conference on Embedded Computing : Proceedings
T1  - Carbon Nanotubes Characterization by Channeled Fast Ions Spatial and Angular Distribution Fingerprints
SP  - 68
EP  - 71
DO  - 10.1109/meco.2016.7525705
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7117
ER  - 

@conference{
author = "Karbunar, Lazar and Borka, Duško and Radović, Ivan",
year = "2016",
abstract = "In this paper we investigate possibility of carbon nanotubes characterization by differentiation in spatial and angular distribution fingerprints obtained by fast ions channeling. We analyze straight single walled carbon nanotubes (SWNTs) interacting with fast ion beams. We calculate the image potential for protons moving through the four types of SWNTs at the speeds of 3 a.u.. We calculate total potential in straight carbon nanotubes. Interaction of channelled ions with nanotube electrons we calculate by linearized, two dimensional (2D), extended two-fluid hydrodynamic model. We simulate ion beams channelling through the four types of SWNTs under calculated conditions of interaction and calculate spatial and angular distributions of channelled particles what we use as method for different SWNTs characterization.",
journal = "5th Mediterranean Conference on Embedded Computing : Proceedings",
title = "Carbon Nanotubes Characterization by Channeled Fast Ions Spatial and Angular Distribution Fingerprints",
pages = "68-71",
doi = "10.1109/meco.2016.7525705",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7117"
}

Karbunar, L., Borka, D.,& Radović, I.. (2016). Carbon Nanotubes Characterization by Channeled Fast Ions Spatial and Angular Distribution Fingerprints. in 5th Mediterranean Conference on Embedded Computing : Proceedings, 68-71.
https://doi.org/10.1109/meco.2016.7525705
https://hdl.handle.net/21.15107/rcub_vinar_7117

Karbunar L, Borka D, Radović I. Carbon Nanotubes Characterization by Channeled Fast Ions Spatial and Angular Distribution Fingerprints. in 5th Mediterranean Conference on Embedded Computing : Proceedings. 2016;:68-71.
doi:10.1109/meco.2016.7525705
https://hdl.handle.net/21.15107/rcub_vinar_7117 .

Karbunar, Lazar, Borka, Duško, Radović, Ivan, "Carbon Nanotubes Characterization by Channeled Fast Ions Spatial and Angular Distribution Fingerprints" in 5th Mediterranean Conference on Embedded Computing : Proceedings (2016):68-71,
https://doi.org/10.1109/meco.2016.7525705 .,
https://hdl.handle.net/21.15107/rcub_vinar_7117 .

TY  - CONF
AU  - Karbunar, Lazar
AU  - Despoja, Vito
AU  - Radović, Ivan
AU  - Mišković, Zoran
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12644
AB  - We present a method to introduce several graphene sheets into the non-retarded Green’s function for a layered structure containing polar insulators, which support transverse optical phonon modes. Dispersion relations are derived to illustrate hybridization of Dirac plasmons in two graphene sheets with phonon modes in an oxide spacer layer between them.
PB  - University of Belgrade : Faculty of Physics
C3  - SPIG 2016 : 28th 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  - Plasmon-phonon hybridization in layered structures including graphene
SP  - 154
EP  - 157
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12644
ER  - 

@conference{
author = "Karbunar, Lazar and Despoja, Vito and Radović, Ivan and Mišković, Zoran",
year = "2016",
abstract = "We present a method to introduce several graphene sheets into the non-retarded Green’s function for a layered structure containing polar insulators, which support transverse optical phonon modes. Dispersion relations are derived to illustrate hybridization of Dirac plasmons in two graphene sheets with phonon modes in an oxide spacer layer between them.",
publisher = "University of Belgrade : Faculty of Physics",
journal = "SPIG 2016 : 28th 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 = "Plasmon-phonon hybridization in layered structures including graphene",
pages = "154-157",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12644"
}

Karbunar, L., Despoja, V., Radović, I.,& Mišković, Z.. (2016). Plasmon-phonon hybridization in layered structures including graphene. in SPIG 2016 : 28th 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., 154-157.
https://hdl.handle.net/21.15107/rcub_vinar_12644

Karbunar L, Despoja V, Radović I, Mišković Z. Plasmon-phonon hybridization in layered structures including graphene. in SPIG 2016 : 28th 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. 2016;:154-157.
https://hdl.handle.net/21.15107/rcub_vinar_12644 .

Karbunar, Lazar, Despoja, Vito, Radović, Ivan, Mišković, Zoran, "Plasmon-phonon hybridization in layered structures including graphene" in SPIG 2016 : 28th 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 (2016):154-157,
https://hdl.handle.net/21.15107/rcub_vinar_12644 .

TY  - JOUR
AU  - Karbunar, Lazar
AU  - Borka, Duško
AU  - Radović, Ivan
AU  - Mišković, Zoran L.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1066
AB  - We investigate the interactions of charged particles with straight and bent single-walled carbon nanotubes (SWNTs) under channeling conditions in the presence of dynamic polarization of the valence electrons in carbon. This polarization is described by a cylindrical, two-fluid hydrodynamic model with the parameters taken from the recent modelling of several independent experiments on electron energy loss spectroscopy of carbon nano-structures. We use the hydrodynamic model to calculate the image potential for protons moving through four types of SWNTs at a speed of 3 atomic units. The image potential is then combined with the Doyle-Turner atomic potential to obtain the total potential in the bent carbon nanotubes. Using that potential, we also compute the spatial and angular distributions of protons channeled through the bent carbon nanotubes, and compare the results with the distributions obtained without taking into account the image potential.
T2  - Chinese Physics B
T1  - Channeling of fast ions through the bent carbon nanotubes: The extended two-fluid hydrodynamic model
VL  - 25
IS  - 4
DO  - 10.1088/1674-1056/25/4/046106
ER  - 

@article{
author = "Karbunar, Lazar and Borka, Duško and Radović, Ivan and Mišković, Zoran L.",
year = "2016",
abstract = "We investigate the interactions of charged particles with straight and bent single-walled carbon nanotubes (SWNTs) under channeling conditions in the presence of dynamic polarization of the valence electrons in carbon. This polarization is described by a cylindrical, two-fluid hydrodynamic model with the parameters taken from the recent modelling of several independent experiments on electron energy loss spectroscopy of carbon nano-structures. We use the hydrodynamic model to calculate the image potential for protons moving through four types of SWNTs at a speed of 3 atomic units. The image potential is then combined with the Doyle-Turner atomic potential to obtain the total potential in the bent carbon nanotubes. Using that potential, we also compute the spatial and angular distributions of protons channeled through the bent carbon nanotubes, and compare the results with the distributions obtained without taking into account the image potential.",
journal = "Chinese Physics B",
title = "Channeling of fast ions through the bent carbon nanotubes: The extended two-fluid hydrodynamic model",
volume = "25",
number = "4",
doi = "10.1088/1674-1056/25/4/046106"
}

Karbunar, L., Borka, D., Radović, I.,& Mišković, Z. L.. (2016). Channeling of fast ions through the bent carbon nanotubes: The extended two-fluid hydrodynamic model. in Chinese Physics B, 25(4).
https://doi.org/10.1088/1674-1056/25/4/046106

Karbunar L, Borka D, Radović I, Mišković ZL. Channeling of fast ions through the bent carbon nanotubes: The extended two-fluid hydrodynamic model. in Chinese Physics B. 2016;25(4).
doi:10.1088/1674-1056/25/4/046106 .

Karbunar, Lazar, Borka, Duško, Radović, Ivan, Mišković, Zoran L., "Channeling of fast ions through the bent carbon nanotubes: The extended two-fluid hydrodynamic model" in Chinese Physics B, 25, no. 4 (2016),
https://doi.org/10.1088/1674-1056/25/4/046106 . .