The influence of the surface parameter changes onto the phonon states in ultrathin crystalline films
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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.
Кључне речи:
Phonons / Ultrathin films / Green's function / Boundary parametersИзвор:
Physica a-statistical mechanics and its applications, 2018, 496, 434-445Издавач:
- Elsevier Science Bv, Amsterdam
Финансирање / пројекти:
- Дизајнирање и моделовање специфичних особина наноструктурних узорака (RS-MESTD-Basic Research (BR or ON)-171039)
- Иновирање форензичких метода и њихова примена (RS-MESTD-Technological Development (TD or TR)-34019)
- Ministry of Science and Technological Development of the Republic of Srpska
- Provincial Secretariat for High Education, Science and Technological Development of Vojvodina
DOI: 10.1016/j.physa.2017.12.138
ISSN: 0378-4371
WoS: 000426330900037
Scopus: 2-s2.0-85041489968
Институција/група
JakovTY - JOUR AU - Šetrajčić, Jovan P. AU - Ilić, Dušan I. AU - Jaćimovski, Stevo PY - 2018 UR - http://jakov.kpu.edu.rs/handle/123456789/893 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", 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. in 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. in Physica a-statistical mechanics and its applications. 2018;496:434-445. doi:10.1016/j.physa.2017.12.138 .
Šetrajčić, Jovan P., Ilić, Dušan I., Jaćimovski, Stevo, "The influence of the surface parameter changes onto the phonon states in ultrathin crystalline films" in Physica a-statistical mechanics and its applications, 496 (2018):434-445, https://doi.org/10.1016/j.physa.2017.12.138 . .