Depinning transition in type-II superconductors

被引：27

作者：

LutkeEntrup, N

Placais, B

Mathieu, P

Simon, Y

机构：

[1] Laboratoire de Physique de la Matière Condensée de l’Ecole Normale Supérieure CNRS URA 1437, Paris, F-75231

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.79.2538

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The surface impedance Z(f) of conventional isotropic materials has been carefully measured for frequencies f ranging from I kHz to 3 MHz, allowing a detailed investigation of the depinning transition. Our results exhibit the irrelevance of classical ideas to the dynamics of vortex pinning. We propose a new picture, where the linear ac response is entirely governed by disordered boundary conditions of a rough surface, whereas in the bulk vortices respond freely. The universal law for Z(f) thus predicted is in remarkable agreement with experiment, and tentatively applies to microwave data in YBaCuO films.

引用

页码：2538 / 2541

页数：4

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