Coherent Spin Current in Two-Dimensional Non-Centrosymmetric Superconductors

Spintronics has become one of the major topics in condensed matter physics in past years due to its physical significance as well as the great potential for new devices. Especially, superconducting spintronics has drawn a lot of attention. However, many studies of spin current suffer from the lack of current conservation law and the short spin relaxation time, which also makes it difficult to utilize spin currents. In this work, we investigate the spin current driven by an in-plane magnetic field in two-dimensional non-centrosymmetric superconductors. Such spin current is expected to be coherent and long-range, which makes it useful to achieve spintronic devices on the macroscopic scale.