Features of the propagation of phonons in graphene nanostructures. Fast high-frequency phonons in a quasi-flexural mode

Autor:	S. B. Feodosyev, I. A. Gospodarev, V. A. Sirenko, E. S. Syrkin, I. S. Bondar, K. A. Minakova
Rok vydání:	2022
Předmět:	Physics and Astronomy (miscellaneous) General Physics and Astronomy
Zdroj:	Low Temperature Physics. 48:628-633
ISSN:	1090-6517 1063-777X
Popis:	The character of propagation in graphene nanostructures of quasi-flexural phonons, whose dispersion law differs from that of sound, is analyzed. Based on the calculation of the frequency dependences of the group velocities and the values of the path of quasiparticles for one period of oscillation, the frequency intervals are established at which: i) phonons propagate freely along all directions of reciprocal space—the propagon zone; ii) phonon propagation along some directions is impossible—diffuse zone; iii) phonons are localized at the nodes of the honeycomb lattice—the locon zone. A comparison is made with a similar classification of phonons in a three-dimensional crystal of cubic symmetry.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9639aa981769c5e11e6586d90b4f6493 https://doi.org/10.1063/10.0012650 Zobrazit plný text záznamu