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
收藏
页码：80 / 84
页数：5
相关论文
共 22 条
[11]   THERMALLY ASSISTED FLUX FLOW AT SMALL DRIVING FORCES [J].
KES, PH ;
AARTS, J ;
VANDENBERG, J ;
VANDERBEEK, CJ ;
MYDOSH, JA .
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1989, 1 (05) :242-248
[12]  
KES PH, 1990, STUDIES HIGH TEMPERA, V5, P83
[13]  
KES PH, 1990, PHYS REV LETT, V64, P1603
[14]  
KIM DH, UNPUB PHYS REV B
[15]   ELASTIC PROPERTIES OF FLUX LATTICES IN ANISOTROPIC HIGH-TC SUPERCONDUCTORS [J].
KOGAN, VG ;
CAMPBELL, LJ .
PHYSICAL REVIEW LETTERS, 1989, 62 (13) :1552-1555
[16]  
LAWRENCE WE, 1971, 12TH P INT C LOW TEM, P361
[17]   THERMALLY ACTIVATED DISSIPATION IN BI2.2SR2CA0.8CU2O8+DELTA [J].
PALSTRA, TTM ;
BATLOGG, B ;
SCHNEEMEYER, LF ;
WASZCZAK, JV .
PHYSICAL REVIEW LETTERS, 1988, 61 (14) :1662-1665
[18]   FIELD STRUCTURE OF VORTEX LATTICES IN UNIAXIAL SUPERCONDUCTORS [J].
THIEMANN, SL ;
RADOVIC, Z ;
KOGAN, VG .
PHYSICAL REVIEW B, 1989, 39 (16) :11406-11412
[19]   ELEMENTARY PINNING POTENTIALS IN SUPERCONDUCTORS WITH ANISOTROPIC FERMI-SURFACE [J].
THUNEBERG, EV .
CRYOGENICS, 1989, 29 (3A) :236-244
[20]  
VANDERBEEK CJ, 1990, IN PRESS MAY P ICMC
123