Phonon anomaly and anisotropic superconducting gap in noncentrosymmetric Li2(Pd1-xPtx)3B

被引：20

作者：

Eguchi, G. ^{[1
]}

Peets, D. C. ^{[1
]}

Kriener, M. ^{[1
]}

Yonezawa, S. ^{[1
]}

Bao, G. ^{[2
]}

Harada, S. ^{[2
]}

Inada, Y. ^{[2
,3
]}

Zheng, G. -q. ^{[2
]}

Maeno, Y. ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan

[2] Okayama Univ, Dept Phys, Okayama 7008530, Japan

[3] Okayama Univ, Grad Sch Educ, Okayama 7008530, Japan

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 16期

基金：

日本学术振兴会;

关键词：

LI2PD3B;

D O I：

10.1103/PhysRevB.87.161203

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the systematic investigation of the specific heat of the noncentrosymmetric superconductor Li-2(Pd1-xPtx)(3)B as a function of x. There is a large deviation of the phononic specific heat from the conventional Debye specific heat for Pt-rich samples. In contrast with the fully gapped conventional behavior for small x, a power-law temperature dependence of the electronic specific heat is observed even at x = 0.5. These results manifest a strongly anisotropic or nodal superconducting gap even at x = 0.5 and a nodal superconducting gap for x greater than or similar to 0.9.

引用

页数：4

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