Probing the superconducting gap symmetry of PrRu4Sb12:: A comparison with PrOs4Sb12 -: art. no. 180509

被引：28

作者：

Chia, EEM

Salamon, MB

Sugawara, H

Sato, H

机构：

[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[2] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.69.180509

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report measurements of the magnetic penetration depth lambda in single crystals of PrRu4Sb12 down to 0.1 K. Both lambda and superfluid density rho(s) exhibit an exponential behavior for T<0.5T(c), with parameters Delta(0)/k(B)T(c)=1.9 and lambda(0)=2900 A. The value of Delta(0) is consistent with the specific-heat jump value of DeltaC/gammaT(c)=1.87 measured elsewhere, while the value of lambda(0) is consistent with the measured value of the electronic heat-capacity coefficient gamma. Our data are consistent with PrRu4Sb12 being a moderate-coupling, fully gapped superconductor. We suggest experiments to study how the nature of the superconducting state evolves with increasing Ru substitution for Os.

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页码：180509 / 1

页数：4

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