Generation and control of noncollinear magnetism by supercurrent
Generation and control of noncollinear magnetism by supercurrent
复制标题
超电流非线性磁力的产生与控制
DOI：
10.1103/physrevb.97.081107
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发表时间：
2018
影响因子：
3.7
通讯作者：
Motome Yukitoshi
中科院分区：
文献类型：
--
作者：
Takashima Rina;Kato Yasuyuki;Yanase Youichi;Motome Yukitoshi
当超导与非共线自旋织构耦合时，会产生丰富的物理现象，例如，单线态库珀对可以转化为三重态对，拓扑超导体可以实现。对于它们的应用，非共线磁性的可控性是一个关键问题。在这里，我们提出了一个超电流可以诱导和控制在单线态超导体之上的相关金属中的非共线磁序。我们发现，超电流的接近效应增强了相关金属的磁不稳定性，导致从顺磁状态到具有螺旋或涡状自旋织构的非共线磁相的相变。此外，这些磁序可以通过超电流的方向来改变。讨论了Rashba自旋-轨道耦合的影响和实验实现。
When superconductivity couples with noncollinear spin textures, rich physics arises, for instance, singlet Cooper pairs can be converted to triplet pairs, and topological superconductors can be realized. For their applications, the controllability of noncollinear magnetism is a crucial issue. Here, we propose that a supercurrent can induce and control noncollinear magnetic orders in a correlated metal on top of a singlet superconductor. We show that the magnetic instability in the correlated metal is enhanced by the proximity effect of supercurrents, which leads to phase transitions from a paramagnetic state to noncollinear magnetic phases with helical or vortexlike spin textures. Furthermore, these magnetic orders can be switched by the direction of the supercurrent. We also discuss the effect of the Rashba spin-orbit coupling and the experimental realization.