Emergent nodal excitations due to coexistence of superconductivity and antiferromagnetism: cases with and without inversion symmetry

被引：46
|
作者：
Fujimoto, Satoshi [1 ]
机构：
[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷 / 08期
关键词：
superconductivity; antiferromagnetism; line node; inversion symmetry;
D O I：
10.1143/JPSJ.75.083704
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We argue the emergence of nodal excitations due to coupling with static antiferromagnetic order in fully gapped superconducting states in both cases with and without inversion symmetry. This line node structure is not accompanied by a sign change of the superconducting gap, in contrast to that of usual unconventional Cooper pairs with higher angular momenta. In the case without inversion symmetry, the stability of the nodal excitations crucially depends on the direction of the antiferromagnetic staggered magnetic moment. A possible realization of this phenomenon in CePt3Si is discussed.
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页数：4
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