Consequences of Anomalous Diffusion in Disordered Systems under Cyclic Forcing

被引：6

作者：

Mailman, Mitch ^{[1
]}

Harrington, Matt

Girvan, Michelle

Losert, Wolfgang

机构：

[1] Univ Maryland, Dept Phys, IREAP, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 22期

关键词：

TRANSPORT;

D O I：

10.1103/PhysRevLett.112.228001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the particle scale response of a 2D frictionless disk system to bulk forcing via cyclic shear with reversal amplitude gamma(r). We find a subdiffusive gamma(r)-dependent regime, which is consistent with models of anomalous diffusion with scale-invariant cage dynamics, and a crossover to diffusive grain motion at high gamma(r). Analysis of local displacements of a particle relative to its cage of neighbors reveals a key distinction from thermal systems. Particles are moved by fluctuations of their cage of neighbors rather than rattling in their cage, indicating a distinct cage-breaking mechanism.

引用

页数：5

共 31 条

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