Giant surface Edelstein effect in d-wave superconductors
Giant surface Edelstein effect in d-wave superconductors
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d 波超导体中的巨表面埃德尔斯坦效应
DOI：
10.1103/physrevb.102.214510
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发表时间：
2020
影响因子：
3.7
通讯作者：
Yanase Youichi
中科院分区：
文献类型：
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作者：
Ikeda Yuhei;Yanase Youichi
埃德尔斯坦效应对于磁矩的电控制很有用。然而，耗散电流产生的焦耳热对其实际应用有害。在本文中，我们研究了具有波或波对称性的二维非中心对称超导体（NCS），并证明表面埃德尔斯坦效应在波内NCS中显着增强。增强的起源归因于无间隙自旋单线非中心对称超导体的表面马约拉纳态特征。从超导自旋电子学的角度来看，这一结果将为通过无耗散超电流实现磁畴切换提供一条途径。我们讨论了铜酸盐超导体异质结构和重费米子超晶格中可能的实验观察。
The Edelstein effect is useful for electric control of the magnetic moment. However, Joule heating created by a dissipative current is harmful to its practical applications. In this paper, we investigate two-dimensional noncentrosymmetric superconductors (NCSs) with either-wave or-wave symmetry and demonstrate that the surface Edelstein effect is significantly enhanced in-wave NCSs. The origin of the enhancement is attributed to surface Majorana states characteristic of gapless spin-singlet noncentrosymmetric superconductors. In the view of superconducting spintronics, this result would give a route to magnetic domain switching by a dissipationless supercurrent. We discuss a possible experimental observation in cuprate superconductor heterostructures and heavy fermion superlattices.