Evidence for unconventional superconductivity in the nonoxide perovskite MgCNi3 from penetration depth measurements -: art. no. 180502

被引：53

作者：

Prozorov, R

Snezhko, A

He, T

Cava, RJ

机构：

[1] Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA

[2] Univ S Carolina, USC NanoCtr, Columbia, SC 29208 USA

[3] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[4] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.68.180502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The London penetration depth lambda(T) was measured in polycrystalline powders of the nonoxide perovskite superconductor MgCNi3 by using a sensitive tunnel-diode resonator technique. The penetration depth exhibits distinctly non s-wave BCS low-temperature behavior, instead showing quadratic temperature dependence, suggestive of a nodal order parameter.

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页数：4

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