论文标题
在二维Rashba耦合超导体中，由非均匀的Zeeman领域自发产生涡流
Spontaneous generation of vortices by a nonuniform Zeeman field in a two-dimensional Rashba coupled superconductor
论文作者
论文摘要
电子交换相互作用和自旋轨道耦合的相互作用导致磁绝缘体岛附近的自发超流，该岛位于二维（2D）超导体的顶部，其磁化值平行于2D电子气体。结果表明，与所研究的情况相反，这种效果仅涉及超导顺序参数的拓扑琐碎的空间变化，应考虑到超电流涡流。后者是在任意形状的岛上边界周围自发产生的，并导致对Zeeman场的筛查。对于通过强烈的Rashba自旋轨道耦合（包括狄拉克系统）的电子，已经考虑了此问题。在后一种情况下，涡流可以携带Majorana零模式。
The interplay of the electron exchange interaction and spin-orbit coupling results in spontaneous supercurrents near magnetic insulator islands, which are placed on the top of a two-dimensional (2D) superconductor, and whose magnetization is parallel to 2D electron gas. It is shown that in contrast to the well studied situation, where such an effect involves only topologically trivial spatial variations of the superconducting order parameter, one should take into account supercurrent vortices. The latter are spontaneously generated around the island's boundary of an arbitrary shape and result in screening of the Zeeman field. This problem has been considered for electrons subject to a strong Rashba spin-orbit coupling, including Dirac systems as well. In the latter case vortices can carry Majorana zero modes.
