LOW-TEMPERATURE INCREASE OF RESISTIVE CRITICAL FIELDS IN CERTAIN SUPERCONDUCTORS - A SIMPLE FLUCTUATION APPROACH

被引:24
作者
COOPER, JR
LORAM, JW
WADE, JM
机构
[1] Interdisciplinary Research Centre in Superconductivity, University of Cambridge, Cambridge CB30HE, Madingley Road
来源
PHYSICAL REVIEW B | 1995年 / 51卷 / 09期
关键词
D O I
10.1103/PhysRevB.51.6179
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The resistive critical fields of several types of superconductor such as Tl2Ba2CuO6+x, -(BEDT- TTF)2Cu(NCS)2, and Ba1-xKxBiO3 show an unusual increase at low temperatures. We argue that this arises from thermodynamic fluctuations which are strongly enhanced because of the reduction in condensation energy density U(H,T) by a magnetic field. This effect should be significant for any material for which U kBTc at low temperatures and zero field, where is the coherence volume, which probably includes most cuprate superconductors. © 1995 The American Physical Society.
引用
收藏
页码:6179 / 6182
页数:4
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