Influence of elastic strain on the density of phonon states and characteristics of discrete breathers in the gap of the phonon spectrum of a crystal with a NaCl structure |
| |
Authors: | S V Dmitriev Yu A Baimova |
| |
Institution: | 1.Institute of Metal Superplasticity Problems,Russian Academy of Sciences,Ufa,Bashkortostan, Russia |
| |
Abstract: | Appreciable elastic strain may considerably change the physical properties of crystals. This effect underlies the elastic
stress technology, which has been intensively developed in recent years. The influence of elastic strain on the density of
phonon states and on the properties of discrete breathers in the gap of the phonon spectrum of a crystal with a NaCl structure
and a considerable difference between the anion and cation masses is studied using the molecular dynamics method. A number
of crystal straining modes are considered. It is shown that the shear components of the strain tensor may significantly change
the density of phonon states but slightly influence the frequencies of discrete breathers. Compression (tensile) strains raise
(lower) the frequency of discrete breathers with a respective polarization. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |