Giant surface Edelstein effect in d-wave superconductors

Edelstein effect is useful for electric control of magnetic moment. However, Joule heating created by a dissipative current is harmful for its practical applications. We investigate two-dimensional noncentrosymmetric superconductors (NCSs) with either s-wave or d-wave symmetry, and demonstrate that a surface Edelstein effect is significantly enhanced in d-wave NCSs. In this talk, I will discuss the origin of the enhancement and show that this is attributed to surface Majorana states characteristic of gapless spin-singlet non-centrosymmetric superconductors. In the view of superconducting spintronics, this result would give a route to magnetic domain switching by dissipationless supercurrent.