ANISOTROPIC THERMOPOWER IN THE A-B PLANE OF AN UNTWINNED YBA2CU3O7-DELTA CRYSTAL

被引：46

作者：

LOWE, AJ

REGAN, S

HOWSON, MA

机构：

[1] Department of Physics, University of Leeds

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.44.9757

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured the thermopower of an untwinned crystal of YBa2Cu3O7-delta in both the a and b directions. In the a direction the thermopower is about +0.7-mu-V/K just above T(c), while in the b direction the thermopower is opposite in sign and -6-mu-V/K. The sharp peak observed at T(c) in twinned crystals is only clearly present in the a-axis measurement. At temperatures close to room temperature the a-axis thermopower becomes temperature independent and very small. It is argued that the peak is evidence of superconducting fluctuation effects in the thermopower.

引用

页码：9757 / 9759

页数：3

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