RELAXATION OF A MOLECULAR GLASS AT INTERMEDIATE TIMES

被引：38

作者：

LEWIS, LJ

WAHNSTROM, G

机构：

[1] UNIV MONTREAL,RECH PHYS & TECHNOL COUCHES MINCES GRP,MONTREAL H3C 3J7,QUEBEC,CANADA

[2] CHALMERS UNIV TECHNOL,DEPT APPL PHYS,S-41296 GOTHENBURG,SWEDEN

[3] GOTHENBURG UNIV,S-41296 GOTHENBURG,SWEDEN

来源：

SOLID STATE COMMUNICATIONS | 1993年 / 86卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0038-1098(93)90376-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The results of a detailed molecular-dynamics investigation of relaxation in the van der Waals system o-terphenyl are presented. Our calculations give evidence for the existence of a fast process on the picosecond timescale. This confirms the neutron-scattering observation of an anomalous decrease of the Debye-Waller factor, predicted by mode-coupling theory, and reconciles it with the temperature-independent process with a 3 ps relaxation time observed in light-scattering experiments. We demonstrate that this process results from the strongly anharmonic motion of molecules trapped in the cages formed by their neighbours.

引用

页码：295 / 299

页数：5

共 24 条

[1] PERSPECTIVE ON THE GLASS-TRANSITION [J].