THERMAL-CONDUCTIVITY ANISOTROPY OF SINGLE-CRYSTAL BI2SR2CACU2O8

被引：96

作者：

CROMMIE, MF ^{[1
]}

ZETTL, A ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,DIV MAT & CHEM SCI,BERKELEY,CA 94720

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.43.408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured the out-of-plane (c-axis) thermal conductivity k(c) of single-crystal Bi2Sr2CaCu2O8 from room temperature to 49 K. In contrast to the previously measured in-plane thermal conductivity k(ab), k(c) appears to be phonon dominated and shows no dramatic anomaly at the superconducting transition temperature T(c). In the normal state above T(c), the electrical conductivity anisotropy sigma-ab/sigma-c is of order 10(4) and is strongly temperature dependent, while k(ab)/k(c) almost-equal-to 6, independent of temperature. Our results suggest an important role played by defect scattering in the c-axis transport mechanism of Bi2Sr2CaCu2O8.

引用

页码：408 / 412

页数：5

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