Out-of-equilibrium spin transport in mesoscopic superconductors
- 20 June 2018
- journal article
- review article
- Published by The Royal Society in Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
- Vol. 376 (2125), 20150342
- https://doi.org/10.1098/rsta.2015.0342
Abstract
The excitations in conventional superconductors, Bogoliubov quasi-particles, are spin- fermions but their charge is energy-dependent and, in fact, zero at the gap edge. Therefore, in superconductors (unlike normal metals) spin and charge degrees of freedom may be separated. In this article, we review spin injection into conventional superconductors and focus on recent experiments on mesoscopic superconductors. We show how quasi-particle spin transport and out-of-equilibrium spin-dependent superconductivity can be triggered using the Zeeman splitting of the quasi-particle density of states in thin-film superconductors with small spin-mixing scattering. Finally, we address the spin dynamics and the feedback of quasi-particle spin imbalances on the amplitude of the superconducting energy gap.Funding Information
- European Research Council (NANO-GRAPHENE 256965)
- Synergy Grants; a C'NANO (DYNAH)
- ANR BLANC (DYCOSMA and MASH)
- ANR JCJC (SPINOES)
- etherlands Organization for Scientific Research (NWO/OCW)
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