Long-range spin imbalance in mesoscopic superconductors under a Zeeman splitting
Superconductivity
2015-06-23 v2 Mesoscale and Nanoscale Physics
Abstract
We develop a theory of spin relaxation in Zeeman-splitted superconducting films at low temperatures. A new mechanism of spin relaxation, specific only for Zeeman-splitted superconductors is proposed. It can explain the extremely high spin relaxation lengths, experimentally observed in Zeeman-splitted superconductors, and their strong growth with the magnetic field. In the framework of this mechanism the observed spin signal is formed by the spin-independent nonequilibrium quasiparticle distribution weighted by the spin-split DOS. We demonstrate that the relaxation length of such a spin signal is determined by the energy relaxation length at energies of the order of the superconducting gap.
Keywords
Cite
@article{arxiv.1412.0292,
title = {Long-range spin imbalance in mesoscopic superconductors under a Zeeman splitting},
author = {I. V. Bobkova and A. M. Bobkov},
journal= {arXiv preprint arXiv:1412.0292},
year = {2015}
}
Comments
6 pages, 2 figures, new references are added