99 9 Interplay between Spin Polarization and out - of - Equilibrium Transport in S - F - S Junctions
نویسنده
چکیده
We present a scattering treatment of transport in S-F-S junctions with a small ferromagnetic metal region inside the junction. The charge carriers are assumed not to thermalize with the fer-romagnet conduction band, and the ferromagnetic and superconductor orders coexist close to the interfaces. This requires a small ferromagnetic region in the junction. Ferromagnetism in the junction provides a Zeeman splitting term to charge carriers. Spin polarization results in an enhancement of Andreev reflection. The equilibrium transport theory in ferromagnet-superconductor junctions is also reviewed, where spin polarization results in a suppression of Andreev reflection.
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