FLUX MOTION IN VERY ANISOTROPIC HIGH-TEMPERATURE SUPERCONDUCTORS

被引：9

作者：

KES, PH

VANDERBEEK, CJ

机构：

[1] Kamerlingh Onnes Laboratorium, Leiden University, 2300 RA Leiden

来源：

PHYSICA B | 1991年 / 169卷 / 1-4期

关键词：

D O I：

10.1016/0921-4526(91)90211-V

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The vortex lattice in extremely anisotropic (high-temperature) superconductors breaks up into two-dimensional (2D) vortices located in the CuO2 layers. In terms of such an anomalous vortex structure recent experiments questioning the mechanism for the mixed-stated resistance resistance, can be explained. Under certain field conditions the layers of 2D vortices become decoupled and may be considered as independent thin films. Assuming that the pinning is caused by oxygen vacancies, one can apply the concepts of collective pinning. It is argued that the thermally assisted flux-flow is caused by hopping of vortex dislocation pairs. An expression for the activation barrier is derived and compared with the results of ac-susceptibility measurements on Bi:2212 single crystals.

引用

页码：80 / 84

页数：5

共 22 条

[1] ORDER PARAMETER AND MAGNETIC-FIELD OF DISTORTED VORTEX LATTICE AND THEIR APPLICATION TO FLUX PINNING IN TYPE-II SUPERCONDUCTORS .1. PARALLEL FLUX LINES [J].