Long-Range Spin Accumulation from Heat Injection in Mesoscopic Superconductors with Zeeman Splitting

M. Silaev, P. Virtanen, F. S. Bergeret, and T. T. Heikkilä
Phys. Rev. Lett. 114, 167002 – Published 23 April 2015
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Abstract

We describe far-from-equilibrium nonlocal transport in a diffusive superconducting wire with a Zeeman splitting, taking into account different spin relaxation mechanisms. We demonstrate that due to the Zeeman splitting, an injection of current in a superconducting wire creates spin accumulation that can only relax via thermalization. This effect leads to a long-range spin accumulation detectable in the nonlocal signal. Our model gives a qualitative explanation and provides accurate fits of recent experimental results in terms of realistic parameters.

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  • Received 26 November 2014

DOI:https://doi.org/10.1103/PhysRevLett.114.167002

© 2015 American Physical Society

Authors & Affiliations

M. Silaev1,2, P. Virtanen1, F. S. Bergeret3, and T. T. Heikkilä4

  • 1Low Temperature Laboratory, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland
  • 2Department of Theoretical Physics, The Royal Institute of Technology, Stockholm SE-10691, Sweden
  • 3Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU, and Donostia International Physics Center (DIPC), Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
  • 4University of Jyväskylä, Department of Physics and Nanoscience Center, P.O. Box 35 (YFL), FI-40014 Jyväskylä, Finland

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Issue

Vol. 114, Iss. 16 — 24 April 2015

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