In this paper, we have analytically investigated how the changes in boundary surface parameters influence the phonon dispersion law in ultrathin films of the simple cubic crystalline structure. Spectra of possible phonon states are analyzed using the method of two-time dependent Green's functions and for the diverse combination of boundary surface parameters, this problem was presented numerically and graphically. It turns out that for certain values and combinations of parameters, displacement of dispersion branches outside of bulk zone occurs, leading to the creation of localized phonon states. This fact is of great importance for the heat removal, electrical conductivity and superconducting properties of ultrathin films.
Keywords:
Phonons / Ultrathin films / Green's function / Boundary parameters
Source:
Physica a-statistical mechanics and its applications, 2018, 496, 434-445
TY - JOUR
AU - Šetrajčić, Jovan P.
AU - Ilić, Dušan I.
AU - Jaćimovski, Stevo
PY - 2018
UR - http://jakov.kpu.edu.rs/handle/123456789/836
AB - In this paper, we have analytically investigated how the changes in boundary surface parameters influence the phonon dispersion law in ultrathin films of the simple cubic crystalline structure. Spectra of possible phonon states are analyzed using the method of two-time dependent Green's functions and for the diverse combination of boundary surface parameters, this problem was presented numerically and graphically. It turns out that for certain values and combinations of parameters, displacement of dispersion branches outside of bulk zone occurs, leading to the creation of localized phonon states. This fact is of great importance for the heat removal, electrical conductivity and superconducting properties of ultrathin films.
PB - Elsevier Science Bv, Amsterdam
T2 - Physica a-statistical mechanics and its applications
T1 - The influence of the surface parameter changes onto the phonon states in ultrathin crystalline films
VL - 496
SP - 434
EP - 445
DO - 10.1016/j.physa.2017.12.138
ER -
@article{
author = "Šetrajčić, Jovan P. and Ilić, Dušan I. and Jaćimovski, Stevo",
year = "2018",
url = "http://jakov.kpu.edu.rs/handle/123456789/836",
abstract = "In this paper, we have analytically investigated how the changes in boundary surface parameters influence the phonon dispersion law in ultrathin films of the simple cubic crystalline structure. Spectra of possible phonon states are analyzed using the method of two-time dependent Green's functions and for the diverse combination of boundary surface parameters, this problem was presented numerically and graphically. It turns out that for certain values and combinations of parameters, displacement of dispersion branches outside of bulk zone occurs, leading to the creation of localized phonon states. This fact is of great importance for the heat removal, electrical conductivity and superconducting properties of ultrathin films.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Physica a-statistical mechanics and its applications",
title = "The influence of the surface parameter changes onto the phonon states in ultrathin crystalline films",
volume = "496",
pages = "434-445",
doi = "10.1016/j.physa.2017.12.138"
}
Šetrajčić, J. P., Ilić, D. I.,& Jaćimovski, S. (2018). The influence of the surface parameter changes onto the phonon states in ultrathin crystalline films.
Physica a-statistical mechanics and its applications
Elsevier Science Bv, Amsterdam., 496, 434-445.
https://doi.org/10.1016/j.physa.2017.12.138
Šetrajčić JP, Ilić DI, Jaćimovski S. The influence of the surface parameter changes onto the phonon states in ultrathin crystalline films. Physica a-statistical mechanics and its applications. 2018;496:434-445
Šetrajčić Jovan P., Ilić Dušan I., Jaćimovski Stevo, "The influence of the surface parameter changes onto the phonon states in ultrathin crystalline films" Physica a-statistical mechanics and its applications, 496 (2018):434-445,
https://doi.org/10.1016/j.physa.2017.12.138 .
