Generalized Einstein Relation in an aging colloidal glass

被引：10

作者：

Abou, Berengere ^{[1
]}

Gallet, Francois ^{[1
]}

Monceau, Pascal ^{[1
]}

Pottier, Noelle ^{[1
]}

机构：

[1] Univ Paris Diderot, Lab Mat & Syst Complexes, CNRS, UMR 7057, F-75205 Paris 13, France

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2008年 / 387卷 / 14期

关键词：

glass transition; aging dynamics; Generalized Einstein Relation;

D O I：

10.1016/j.physa.2008.02.034

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an experimental investigation of the Generalized Einstein Relation (GER), a particular form of a fluctuation-dissipation relation, in an out-of-equilibrium visco-elastic fluid. Micrometer beads, used as thermometers, are immersed in an aging colloidal glass to provide both fluctuation and dissipation measurements. The deviations from the Generalized Einstein Relation are derived as a function of frequency and aging time. The observed deviations are interpreted as directly related to the change in the glass relaxation times with aging time. In our scenario, deviations are observed in the regime where the observation timescale is of the order of a characteristic relaxation time of the glass. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：3410 / 3422

页数：13

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