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

Authors

Taiki Matsushita, The University of Osaka
Jiei Ando, The University of Osaka
Yusuke Masaki, Tohoku University
Takeshi Mizushima, The University of Osaka
Satoshi Fujimoto, The University of Osaka
Ilya Vekhter, Louisiana State University

Document Type

Article

Publication Date

3-4-2022

Abstract

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.

Publication Source (Journal or Book title)

Physical Review Letters

Recommended Citation

Matsushita, T., Ando, J., Masaki, Y., Mizushima, T., Fujimoto, S., & Vekhter, I. (2022). Spin-Nernst Effect in Time-Reversal-Invariant Topological Superconductors. Physical Review Letters, 128 (9) https://doi.org/10.1103/PhysRevLett.128.097001