Depinning transition at the upper critical dimension

被引：11
|
作者：
Fedorenko, AA [1 ]
Stepanow, S [1 ]
机构：
[1] Univ Halle Wittenberg, Fachbereich Phys, D-06099 Halle An Der Saale, Germany
来源：
PHYSICAL REVIEW E | 2003年 / 67卷 / 05期
关键词：
D O I：
10.1103/PhysRevE.67.057104
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We study the effect of quenched random field disorder on a driven elastic interface close to the depinning transition at the upper critical dimension d(c)=4 using the functional renormalization group. We have found that the displacement correlation function behaves with distance x as (ln xLambda(0))(2/3) for large x. Slightly above the depinning transition the force-velocity characteristics are described by the equation vsimilar tof\ln f\(2/9), while the correlation length behaves as L(v)similar tof(-1/2)\ln f\(1/6), where f=F/F-c-1 is the reduced driving force.
引用
收藏
页码：1 / 057104
页数：4
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