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arXiv · 1411.7426

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

M. Silaev·P. Virtanen·F. S. Bergeret·T. T. Heikkilä
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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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M. Silaev, P. Virtanen, F. S. Bergeret, T. T. Heikkilä. 2014-11-26. Long-range spin and charge accumulation in mesoscopic superconductors with Zeeman splitting. https://doi.org/10.1103/physrevlett.114.167002

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