Anomalous low-temperature thermal conductivity of MgB2

被引：1

作者：

Sologubenko, AV ^{[1
]}

Jun, J ^{[1
]}

Kazakov, SM ^{[1
]}

Karpinski, J ^{[1
]}

Ott, HR ^{[1
]}

机构：

[1] ETH Honggerberg, Festkorperphys Lab, CH-8093 Zurich, Switzerland

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 388卷

关键词：

MgB2; superconductivity; thermal conductivity; mixed state;

D O I：

10.1016/S0921-4534(02)02681-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ab-plane thermal conductivity of single-crystalline hexagonal MgB2 has been measured as a function of magnetic field with orientations both parallel and perpendicular to the c-axis and at temperatures between 0.5 and 8 K. The observed anomalous variation of the thermal conductivity in magnetic fields at constant temperature is consistent with a field-induced suppression of two superconducting energy gaps of significantly different magnitude. An anomalous nonlinear temperature dependence of the electronic thermal conductivity, violating the Wiedemann-Franz law, is observed in the field-induced normal state. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：133 / 134

页数：2

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