Tandem Pairing in Heavy-Fermion Superconductors

被引：32
|
作者：
Flint, Rebecca [1 ]
Coleman, Piers [1 ]
机构：
[1] Rutgers State Univ, Ctr Mat Theory, Piscataway, NJ 08854 USA
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 24期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.105.246404
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We consider the internal structure of a d-wave heavy-fermion superconducting condensate, showing that it necessarily contains two components condensed in tandem: pairs of quasiparticles on neighboring sites and composite pairs consisting of two electrons bound to a single local moment. These two components draw upon the antiferromagnetic and Kondo interactions to cooperatively enhance the superconducting transition temperature. This tandem condensate is electrostatically active, with an electric quadrupole moment predicted to lead to a superconducting shift in the nuclear quadrupole resonance frequency.
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页数：4
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