Spin-fluctuation-mediated pairing in the heavy fermion superconductors without inversion symmetry CeRhSi3 and CeIrSi3

被引：1
|
作者：
Tada, Yasuhiro [1 ]
Fujimoto, Satoshi [2 ]
Kawakami, Norio [1 ,2 ]
机构：
[1] Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan
[2] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 12期
关键词：
Superconductivity;
D O I：
10.1016/j.jpcs.2008.06.085
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We study the pairing symmetry of the noncentrosymmetric heavy fermion superconductors CeRhSi3 and CeIrSi3 under pressures, which are both antiferromagnets at ambient pressure. We solve the Eliashberg equation by means of the random phase approximation and find that the mixing state of extended s-wave and p-wave rather than the d + f wave state could be realized by enhanced antiferromagnetic spin fluctuations. The gap function has line nodes on the Fermi Surface. We also examine the NMR relaxation rate in the Superconducting state and find that 1/(T1T) exhibits no coherence peak and behaves as 1/(T1T) alpha T-2. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3341 / 3344
页数：4
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