Transport through ferromagnet/superconductor interfaces

Details Transport through ferromagnet/superconductor interfaces Transport through ferromagnet/superconductor interfaces

2003-11-14

arxiv.org/abs/cond-mat/0311334v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

to appear in the proceedings of the St. Petersburg NATO Conference on Quantum transport, St. Petersburg, August, 2003

Scientific paper

The differential resistance of submicron-size ferromagnet/superconductor interface structures shows asymmetries as a function of the current through the ferromagnet/superconductor interface. These asymmetries are a consequence of spin-polarized electron transport from the ferromagnet to the superconductor, coupled with the Zeeman-splitting of the superconducting quasiparticle density of states. They are sensitive to the orientation of the magnetization of the ferromagnet, as the magnetic field required to spin-split the quasiparticle density of states can be provided by the ferromagnetic element itself.

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