Magnetization and spin current in non-centrosymmetric superconductors with Rashba spin-orbit interaction

ORAL

Abstract

Spintronics is attracting intensive attention as a candidate for the next generation devices. In spintronics, spin current play an important role and there are several methods to make spin current, for example, spin Hall effect and spin pumping. As for the electrical spin generation, the Edelstein-effect with Rashba spin-orbit interaction (RSOI) is a representative one.
In the normal state, spin current generated by RSOI was studied analytically and found to be proportional to JC2 [1]. And as for non-centrosymmetric superconductors with RSOI, there is a previous theoretical work about Edelstein-effect [2], which is focusing on the temperature region slightly below the superconducting critical temperature and chemical potential well above the band crossing point. Here we study the magnetization and spin current produced by the super current in 2D non-centrosymmetric superconductors with RSOI for the whole region of temperature and chemical potential. We have found the highly efficient spin supercurrent generation when the electron density is small.

[1] K. Hamamoto, et al., Phys. Rev. B, 95, 224430 (2017)
[2] V. M. Edelstein, Phys. Rev. Lett, 75, 2004 (1995).

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Presenters

  • Kanta Hiroki

    • Department of Applied Physics, University of Tokyo

Authors

  • Kanta Hiroki

    • Department of Applied Physics, University of Tokyo

  • James Jun He

    • RIKEN Center for Emergent Matter Science (CEMS)

  • Keita Hamamoto

    • Department of Applied Physics, University of Tokyo
    • University of Tokyo

  • Naoto Nagaosa

    • University of Tokyo, Riken CEMS
    • Department of Applied Physics, University of Tokyo
    • RIKEN Center for Emergent Matter Science (CEMS)
    • RIKEN CEMS
    • Center for Emergent Matter Science, RIKEN
    • RIKEN
    • Department of applied physics, The University of Tokyo
    • Department of Applied Physics, Universtiy of Tokyo
    • University of Tokyo