PHONON DAMPING BY TRANSLATION-ROTATION COUPLING IN ORIENTATIONALLY DISORDERED MOLECULAR-CRYSTALS

被引：5
|
作者：
DEUTSCH, C
HULLER, A
机构：
[1] Institut für Theoretische Physik, Universität Erlangen-Nürnberg, Erlangen, W-8520
来源：
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1992年 / 86卷 / 03期
关键词：
D O I：
10.1007/BF01323735
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A simple model for the translation-rotation coupling in orientationally disordered molecular crystals (ODIC) is used to investigate the effect of the coupling to the damping of acoustic phonons in an fcc-ODIC composed of tetrahedral molecules. The influence of the coupling is calculated as a function of molecular and lattice parameters in the framework of linear response theory. The results are applied to the plastic phase I of solid CD4, revealing a strong damping of short-wavelength phonons. This is consistent with experimental and molecular dynamics observations.
引用
收藏
页码：411 / 418
页数：8
相关论文
共 50 条
12345