TENSOR MAGNETOTHERMAL RESISTANCE IN YBA2CU3O7-X VIA ANDREEV SCATTERING OF QUASI-PARTICLES

被引：106

作者：

YU, F

SALAMON, MB

LEGGETT, AJ

LEE, WC

GINSBERG, DM

机构：

[1] UNIV ILLINOIS,SCI & TECHNOL CTR SUPERCONDUCT,URBANA,IL 61801

[2] SOOKMYUNG UNIV,DEPT PHYS,SEOUL 140742,SOUTH KOREA

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.74.5136

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A magnetic field in the a-b plane of an untwinned single crystal of YBa2Cu3O7-x (Tc=92 K) is found to induce field-dependent off-diagonal elements in the thermal conductivity tensor at 10 K. The principal axes of the field-dependent part of the tensor lie along equivalent 110 directions; a principal component is maximized when the field is along the corresponding principal axis. A model that considers Andreev reflection of thermally excited quasiparticles by vortex screening currents gives semiquantitative agreement with experiment only if the gap function has nodes in the vicinity of 110. © 1995 The American Physical Society.

引用

页码：5136 / 5139

页数：4

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