We investigate the ground state properties of a noncentrosymmetric superconductor near a surface. We determine the spectrum of Andreev bound states due to surface-induced mixing of bands with opposite spin helicities for a Rashba-type spin-orbit coupling. We find that the order parameter suppression qualitatively changes the bound state spectrum. The spin structure of Andreev states leads to a spin supercurrent along the interface, which is strongly enhanced compared to the normal state spin current. Particle and hole coherence amplitudes show Faraday-like rotations of the spin along quasiparticle trajectories. © 2008 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Vorontsov, A., Vekhter, I., & Eschrig, M. (2008). Surface bound states and spin currents in noncentrosymmetric superconductors. Physical Review Letters, 101 (12) https://doi.org/10.1103/PhysRevLett.101.127003