Spin-Nernst Effect in Time-Reversal-Invariant Topological Superconductors
Spin-Nernst Effect in Time-Reversal-Invariant Topological Superconductors
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DOI：
10.1103/physrevlett.128.097001
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发表时间：
2022-03-04
影响因子：
8.6
通讯作者：
Vekhter, Ilya
中科院分区：
文献类型：
--
作者：
Matsushita, Taiki;Ando, Jiei;Vekhter, Ilya
我们研究了时间逆不变拓扑超导体中的自旋能思效应，并证明了它为螺旋库珀对提供了确凿的证据。自旋能效应源于准粒子在非磁性杂质处的非对称自旋空间散射，并通过温度梯度产生横向自旋电流。该效应的符号和大小都敏感地依赖于杂质位点的散射相移。因此，自旋能效应是唯一适合于识别时间反转不变拓扑超导序的。
We investigate the spin-Nernst effect in time-reversal-invariant topological superconductors, and show that it provides smoking-gun evidence for helical Cooper pairs. The spin-Nernst effect stems from asymmetric, in spin space, scattering of quasiparticles at nonmagnetic impurities, and generates a transverse spin current by the temperature gradient. Both the sign and the magnitude of the effect sensitively depend on the scattering phase shift at impurity sites. Therefore the spin-Nernst effect is uniquely suitable for identifying time-reversal-invariant topological superconducting orders.