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arXiv · 2110.00463

Spin-Nernst Effect in Time-Reversal-Invariant Topological Superconductors

Taiki Matsushita·Jiei Ando·Yusuke Masaki·Takeshi Mizushima·Satoshi Fujimoto·Ilya Vekhter
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Abstract

We investigate the spin-Nernst effect in time-reversal invariant topological superconductors, and show that it provides a 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.

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Taiki Matsushita, Jiei Ando, Yusuke Masaki, Takeshi Mizushima, Satoshi Fujimoto, Ilya Vekhter. 2022-02-21. Spin-Nernst Effect in Time-Reversal-Invariant Topological Superconductors. https://doi.org/10.1103/physrevlett.128.097001

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