期刊
PHYSICS OF THE SOLID STATE
卷 61, 期 11, 页码 2139-2144出版社
PLEIADES PUBLISHING INC
DOI: 10.1134/S1063783419110313
关键词
nonlinear dynamics; graphene; delocalized oscillations; second harmonic generation
资金
- Russian Science Foundation [18-72-00006]
- Russian Foundation for Basic Research [18-32-20158 mol_a_ved]
- State Assignment of the Institute for Metals Superplasticity Problems (Russian Academy of Sciences)
- Russian Science Foundation [18-72-00006] Funding Source: Russian Science Foundation
The dynamics of a three-component nonlinear delocalized vibrational mode in graphene is studied with molecular dynamics. This mode, being a superposition of a root and two one-component modes, is an exact and symmetrically determined solution of nonlinear equations of motion of carbon atoms. The dependences of a frequency, energy per atom, and average stresses over a period that appeared in graphene are calculated as a function of amplitude of a root mode. We showed that the vibrations become periodic with certain amplitudes of three component modes, and the vibrations of one-component modes are close to periodic one and have a frequency twice the frequency of a root mode, which is noticeably higher than the upper boundary of a spectrum of low-amplitude vibrations of a graphene lattice. The data obtained expand our understanding of nonlinear vibrations of graphene lattice.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据