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  • Letter

Anisotropic superconducting spin transport at magnetic interfaces

Yuya Ominato1, Ai Yamakage2, and Mamoru Matsuo1,3,4,5

  • 1Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
  • 2Department of Physics, Nagoya University, Nagoya 464-8602, Japan
  • 3CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
  • 4Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
  • 5RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan

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Phys. Rev. B 106, L161406 – Published 14 October, 2022

DOI: https://doi.org/10.1103/PhysRevB.106.L161406

Abstract

We present a theoretical investigation of anisotropic superconducting spin transport at a magnetic interface between a p-wave superconductor and a ferromagnetic insulator. Our formulation describes the ferromagnetic resonance modulations due to spin current generation depending on spin-triplet Cooper pair, including the frequency shift and enhanced Gilbert damping, in a unified manner. We find that the Cooper pair symmetry is detectable from the qualitative behavior of the ferromagnetic resonance modulation. Our theory paves the way toward anisotropic superconducting spintronics.

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Phys. Rev. B 106, L161406– Published 14 October, 2022
  • Received 13 February 2022
  • Accepted 29 September 2022
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