Spontaneous symmetry breaking induced thermospin effect in superconducting tunnel junctions

  title={Spontaneous symmetry breaking induced thermospin effect in superconducting tunnel junctions},
  author={Gaia Germanese and Federico Paolucci and G. Marchegiani and Alessandro Braggio and Francesco Giazotto},
  journal={Physical Review B},
We discuss the charge and the spin tunneling currents between two Bardeen-Cooper-Schrieffer (BCS) superconductors, where one density of states is spin-split by the proximity of a ferromagnetic insulator. 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 any polarizing tunnel barrier. The two spin components… 

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