Depinning in a random medium

被引:16
作者
Kinzelbach, H [1 ]
Lassig, M [1 ]
机构
[1] MAX PLANCK INST KOLLOID & GRENZFLACHENFORSCH,D-14513 TELTOW,GERMANY
来源
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1995年 / 28卷 / 23期
关键词
D O I
10.1088/0305-4470/28/23/009
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We develop a renormalized continuum held theory for a directed polymer interacting with a random medium and a single extended defect. The renormalization group is based on the operator algebra of the pinning potential; it has novel features due to the breakdown of hyperscaling in a random system. There is a second-order transition between a localized and a delocalized phase of the polymer; we obtain analytic results on its critical pinning strength and scaling exponents. Our results are directly related to spatially inhomogeneous Kardar-Parisi-Zhang surface growth.
引用
收藏
页码:6535 / 6541
页数:7
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