Long-range spin and charge accumulation in mesoscopic superconductors with Zeeman splitting

Abstract

We describe the far from equilibrium non-local transport in a diffusive superconducting wire with a Zeeman splitting, taking into account the different spin relaxation mechanisms. We demonstrate that due to the Zeeman splitting an injection of a current in a superconducting wire creates a spin accumulation that can only relax via thermalization. In addition the Zeeman splitting also causes a suppression of the spin-orbit and spin-flip scattering rates. These two effects lead to long-range spin and charge accumulations detectable in the non-local signal. Our model explains the main qualitative features of recent experimental results in terms of realistic parameters and predicts a strong dependence of the non-local signal on the orbital depairing effect from an induced magnetic field.

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Cited by in corpus (5)

• Microscopic theory of spin transport at the interface between the superconductor and a ferromagnetic insulator
• Creation of spin-triplet Cooper pairs in the absence of magnetic ordering
• Conservation of spin supercurrents in superconductors
• Evidence for spin-dependent energy transport in a superconductor
• Spin injection and spin relaxation in odd-frequency superconductors