Extremely strong dependence of superconductivity on disorder in Sr2RuO4

被引：499

作者：

Mackenzie, AP

Haselwimmer, RKW

Tyler, AW

Lonzarich, GG

Mori, Y

Nishizaki, S

Maeno, Y

机构：

[1] Univ Cambridge, Interdisciplinary Res Ctr Superconduct, Cambridge CB3 0HE, England

[2] Univ Cambridge, Dept Phys, Cambridge CB3 0HE, England

[3] Kyoto Univ, Dept Phys, Kyoto 60601, Japan

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.80.161

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A key signature of unconventional or non-s-wave superconductivity is a strong suppression of T-c, by nonmagnetic as well as by magnetic impurities. We report measurements of chemical composition and of transport properties in the same single crystals of Sr2RuO4 which show that nonmagnetic impurities destroy superconductivity when the residual resistivity exceeds 1 mu Omega cm, i.e., when the carrier mean free path falls below the superconducting coherence length. This behavior strongly supports models of non-s-wave (e.g., p-or d-wave) pairing in this layered perovskite oxide.

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页码：161 / 164

页数：4

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