DIFFUSION IN THE PRESENCE OF TOPOLOGICAL DISORDER

被引：19

作者：

BAUSCH, R ^{[1
]}

SCHMITZ, R ^{[1
]}

TURSKI, LA ^{[1
]}

机构：

[1] POLISH ACAD SCI,CTR THEORET PHYS,PL-02668 WARSAW,POLAND

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.73.2382

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A general framework is presented for the discussion of Brownian motion in crystals with randomly distributed topological defects. In a two-dimensional lattice with disclinations one finds a nonuniversal subdiffusional behavior if screening in the disclination ensemble is taken into account. Without screening, a Sinai-type diffusion is expected. In a three-dimensional random array of parallel screw dislocations, a Brownian particle shows anisotropic normal diffusion. However, the process no longer is Gaussian and displays long-time tails in the fourth-order cumulants.

引用

页码：2382 / 2385

页数：4

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