DISORDER-INDUCED DEPINNING TRANSITION

被引：35

作者：

HWA, T ^{[1
]}

NATTERMANN, T ^{[1
]}

机构：

[1] UNIV COLOGNE, INST THEORET PHYS, D-50937 COLOGNE, GERMANY

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.51.455

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The competition in the pinning of a directed polymer by a columnar pin and a background of random point impurities is investigated systematically using the renormalization-group method. With the aid of the mapping to the noisy-Burgers equation and the use of the mode-coupling method, the directed polymer is shown to be marginally localized to an arbitrary weak columnar pin in 1+1 dimensions. This weak-localization effect is attributed to the existence of large scale, nearly degenerate optimal paths of the randomly pinned directed polymer. The critical behavior of the depinning transition above 1+1 dimensions is obtained via an expansion. © 1995 The American Physical Society.

引用

页码：455 / 469

页数：15

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