Spin resolved Andreev reflection in ferromagnet-superconductor junctions with Zeeman splitting

Details Spin resolved Andreev reflection in ferromagnet-superconductor junctions with Zeeman splitting Spin resolved Andreev reflection in ferromagnet-superconductor junctions with Zeeman splitting

1999-08-31

arxiv.org/abs/cond-mat/9908465v1

Physics

Condensed Matter

Superconductivity

RevTex. 13 pages. 3 figures included

Scientific paper

10.1209/epl/i2000-00532-1

Andreev reflection in ferromagnet-superconductor junctions is derived in a regime in which Zeeman splitting dominates the response of the superconductor to an applied magnetic field. Spin-up and spin-down Andreev reflections are shown to be resolved as voltage is increased. In the metallic limit, the transition from Andreev to tunnel conductivity in the spin-up channels has a non trivial behavior when spin polarization is increased. The conductance is asymmetric in a voltage reversal.

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