Structure and dynamics of glass formers: Predictability at large length scales

被引：103

作者：

Berthier, Ludovic ^{[1
,2
,4
,5
]}

Jack, Robert L. ^{[3
]}

机构：

[1] Argonne Natl Lab, Joint Theory Inst, Chicago, IL 60637 USA

[2] Univ Chicago, Chicago, IL 60637 USA

[3] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[4] Univ Montpellier 2, UMR 5587, Lab Colloides Verres & Nanomat, F-34095 Montpellier, France

[5] CNRS, F-34095 Montpellier, France

来源：

PHYSICAL REVIEW E | 2007年 / 76卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevE.76.041509

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Dynamic heterogeneity in glass formers has been related to their static structure using the concept of dynamic propensity. We reexamine this relationship by analyzing dynamical fluctuations in two atomistic glass formers and two theoretical models. We introduce quantitative statistical indicators which show that the dynamics of individual particles cannot be predicted on the basis of the propensity or by any structural indicator. However, the spatial structure of the propensity field does have predictive power for the spatial correlations associated with dynamic heterogeneity. Our results suggest that the quest for a connection between the static and dynamic properties of glass formers at the particle level is in vain, but they demonstrate that such a connection does exist on larger length scales.

引用

页数：7

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