Vorontsov, A. B., Vekhter, I. and Eschrig, Matthias (2008) Surface bound states and spin currents in noncentrosymmetric superconductors. Physical Review Letters, 101 (12).
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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.
This is a Submitted version This version's date is: 19/9/2008 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/5f84044d-e2c2-e54b-6d11-13487ffc1a27/3/
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