Magnetoelectric effects in heavy-fermion superconductors without inversion symmetry

被引:111
作者
Fujimoto, S [1 ]
机构
[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
来源
PHYSICAL REVIEW B | 2005年 / 72卷 / 02期
关键词
D O I
10.1103/PhysRevB.72.024515
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We investigate the effects of strong electron correlation on magnetoelectric transport phenomena in noncentrosymmetric superconductors with particular emphasis on its application to the recently discovered heavy-fermion superconductor CePt3Si. Taking into account electron correlation effects in a formally exact way, we obtain the expression of the magnetoelectric coefficient for the Zeeman-field-induced paramagnetic supercurrent, the existence of which was predicted more than a decade ago. It is found that in contrast to the usual Meissner current, which is much reduced by the mass renormalization factor in the heavy-fermion state, the paramagnetic supercurrent is not affected by the Fermi liquid effect. This result implies that the experimental observation of the magnetoelectric effect is more feasible in heavy-fermion systems than that in conventional metals with moderate effective mass.
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页数:7
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