PINNING BY DIRECTED PERCOLATION

被引：217

作者：

TANG, LH ^{[1
]}

LESCHHORN, H ^{[1
]}

机构：

[1] RUHR UNIV BOCHUM, FAK PHYS & ASTRON, W-4630 BOCHUM, GERMANY

来源：

PHYSICAL REVIEW A | 1992年 / 45卷 / 12期

关键词：

D O I：

10.1103/PhysRevA.45.R8309

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose directed percolation as a generic mechanism for interface pinning in a two-dimensional medium with quenched point disorder. The roughness of the interface just below a critical depinning transition is found to obey a power law with an exponent-zeta(c)=v(perpendicular-to)/v(parallel-to)congruent-to 0.63. A moving interface near the transition is not self-affine, but may nevertheless be assigned an effective roughness exponent comparable to the values determined in fluid displacement experiments in porous media.

引用

页码：R8309 / R8312

页数：4

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