title: Long-range spin accumulation from heat injection in mesoscopic superconductors with Zeeman splitting.
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.
authors.affiliation: Low Temperature Laboratory, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland.|Department of Theoretical Physics, The Royal Institute of Technology, Stockholm SE-10691, Sweden.
authors.forename: M
authors.initials: M
authors.lastname: Silaev
authors.affiliation: Low Temperature Laboratory, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland.
authors.forename: P
authors.initials: P
authors.lastname: Virtanen
authors.affiliation: Centro 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.
authors.forename: F S
authors.initials: FS
authors.lastname: Bergeret
authors.affiliation: University of Jyväskylä, Department of Physics and Nanoscience Center, P.O. Box 35 (YFL), FI-40014 Jyväskylä, Finland.
authors.forename: T T
authors.initials: TT
authors.lastname: Heikkilä