Spontaneous symmetry breaking-induced thermospin effect in superconducting tunnel junctions
Mesoscale and Nanoscale Physics
2021-11-10 v2 Superconductivity
Abstract
We discuss the charge and the spin tunneling currents between two Bardeen-Cooper-Schrieffer (BCS) superconductors, where one density of states is spin-split. In the presence of a large temperature bias across the junction, we predict the generation of a spin-polarized thermoelectric current. This thermo-spin effect is the result of a spontaneous particle-hole symmetry breaking in the absence of a polarizing tunnel barrier. The two spin components, which move in opposite directions, generate a spin current larger than the purely polarized case when the thermo-active component dominates over the dissipative one.
Keywords
Cite
@article{arxiv.2105.01527,
title = {Spontaneous symmetry breaking-induced thermospin effect in superconducting tunnel junctions},
author = {Gaia Germanese and Federico Paolucci and Giampiero Marchegiani and Alessandro Braggio and Francesco Giazotto},
journal= {arXiv preprint arXiv:2105.01527},
year = {2021}
}