Universal heat conduction in YBa2Cu3O6.9

被引：194

作者：

Taillefer, L ^{[1
]}

Lussier, B ^{[1
]}

Gagnon, R ^{[1
]}

Behnia, K ^{[1
]}

Aubin, H ^{[1
]}

机构：

[1] UNIV PARIS 11,CNRS,PHYS SOLIDES LAB,F-91405 ORSAY,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.79.483

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The thermal conductivity of YBa2Cu3O6.9 was measured at low temperatures in untwinned single crystals with concentrations of Zn impurities from 0% to 3% of Cu. A linear term k(0)/T = 0.19 mWK(-2)cm(-1) is clearly resolved as T --> 0, and found to be virtually independent of Zn concentration. The existence of this residual normal fluid strongly validates the basic theory of transport in unconventional superconductors. Moreover, the observed universal behavior is in quantitative agreement with calculations for a gap function of d-wave symmetry.

引用

页码：483 / 486

页数：4

共 21 条

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