How do dynamic heterogeneities evolve in time?

被引：36

作者：

Doliwa, B ^{[1
]}

Heuer, A

机构：

[1] Max Planck Inst Polymer Res, Mainz, Germany

[2] Univ Munster, Dept Phys Chem, D-4400 Munster, Germany

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2002年 / 307卷

关键词：

D O I：

10.1016/S0022-3093(02)01437-0

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We present simulations of a hard disk system and analyze the time evolution of the dynamic heterogeneities. We characterize the time evolution of slow regions and slow particles individually. The motion of slow clusters turns out to be very restricted, i.e. a cluster is generated and annihilated in a spatial region four times the size of its maximum instantaneous extent. The residual motion of the cluster can be traced back to subdiffusive motion of the constituent particles and the process of absorption and loss of adjacent particles. The subdiffusive dynamics are independent of how long the particles remain slow. Clusters of fast particles show an even smaller reach., which seems to be due to their short life time. (C) 2002 Elsevier Science B.V. All rights reserved.

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页码：32 / 39

页数：8

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