论文标题
巨大的地表Edelstein效果$ D $ - 波超导体
Giant surface Edelstein effect in $d$-wave superconductors
论文作者
论文摘要
Edelstein效应对于磁矩的电控制很有用。但是，由耗散电流产生的焦耳加热对其实际应用有害。在本文中，我们研究了具有$ s $ - 波或$ d $ - 波 - 波对称的二维非中心超对导器（NCSS），并证明在$ d $ - 波ncss中，地表埃德尔斯坦效应显着增强。增强的起源归因于表面主要状态的特征，这是无间隙旋转超导体的特征。鉴于超导旋转的旋转，该结果将通过无耗散的超电流为磁性域切换提供途径。我们讨论了铜酸盐超导体异质结构和重型费米昂超级晶格的可能实验观察。
Edelstein effect is useful for electric control of magnetic moment. However, Joule heating created by a dissipative current is harmful for its practical applications. In this paper, we investigate two-dimensional noncentrosymmetric superconductors (NCSs) with either $s$-wave or $d$-wave symmetry, and demonstrate that a surface Edelstein effect is significantly enhanced in $d$-wave NCSs. The origin of the enhancement is attributed to surface Majorana states characteristic of gapless spin-singlet superconductors. In the view of superconducting spintronics, this result would give a route to magnetic domain switching by dissipationless supercurrent. We discuss a possible experimental observation in cuprate superconductor heterostructures and heavy fermion superlattices.
