Emergent Nodal Excitations due to Coexistence of Superconductivity and Antiferromagnetism: Cases with and without Inversion Symmetry
Emergent Nodal Excitations due to Coexistence of Superconductivity and Antiferromagnetism: Cases with and without Inversion Symmetry
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DOI：
10.1143/jpsj.75.083704
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发表时间：
2006-05
影响因子：
1.7
通讯作者：
S. Fujimoto
中科院分区：
文献类型：
--
作者：
S. Fujimoto
我们讨论了由于在完全间隙超导态中与静态反铁磁序的耦合而产生的节点激发，无论在有无反转对称性的情况下。与通常具有较高角动量的非常规库珀对相比，这种线节点结构不伴有超导间隙的符号变化。在没有反转对称的情况下，节点激励的稳定性主要取决于反铁磁交错磁矩的方向。讨论了在CePt 3si中实现这一现象的可能性。
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 CePt 3 Si is discussed.