Berry Curvature Induced Spin Nernst and Thermal Edelstein Effects in Proximity Superconductors

Zhen-Cheng Liao; Cong Xiao; Zhi Wang; Qian Niu

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arXiv · 2412.08451

Berry Curvature Induced Spin Nernst and Thermal Edelstein Effects in Proximity Superconductors

Zhen-Cheng Liao·Cong Xiao·Zhi Wang·Qian Niu

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Abstract

We propose two thermo-spintronic responses in proximity induced superconductors with spin-orbit coupled band - spin Nernst effect and thermal Edelstein effect stemming respectively from momentum-space and mixed superconducting Berry curvatures. We unveil that the Bloch band spin-orbit coupling and pairing are entangled in shaping the superconducting Berry curvatures rather than in an additive manner. The resulting thermo-spintronic responses are significantly enhanced at low temperatures by the emergence of Bogoliubov Fermi surface, and can be effectively controlled by tuning the latter. The effects render a probe of Bogoliubov Fermi surface and superconducting Berry curvatures supported by it. Our work reveals Berry curvature properties in topologically trivial proximity superconductors with spin-orbit coupling, and opens a new route to superconducting spintronics.

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Zhen-Cheng Liao, Cong Xiao, Zhi Wang, Qian Niu. 2024-12-11. Berry Curvature Induced Spin Nernst and Thermal Edelstein Effects in Proximity Superconductors. https://arxiv.org/abs/2412.08451

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