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

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 J_C² [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).