Incomplete Andreev reflection in a clean Superconductor/Ferromagnet/Superconductor junction

Details Incomplete Andreev reflection in a clean Superconductor/Ferromagnet/Superconductor junction Incomplete Andreev reflection in a clean Superconductor/Ferromagnet/Superconductor junction

2004-04-08

arxiv.org/abs/cond-mat/0404215v3

Phys. Rev. B 71, 012507 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, added references

Scientific paper

10.1103/PhysRevB.71.012507

We study the Josephson effect in a clean Superconductor-Ferromagnet-Superconductor junction for arbitrarily large spin polarizations. The Andreev reflection at a clean Ferromagnet-Superconductor interface is incomplete, and Andreev channels with a large incidence angle are progressively suppressed with increasing exchange energy. As a result, the critical current exhibits oscillations as a function of the exchange energy and of the length of the ferromagnet and has a temperature dependence which deviates from the one predicted by the quasiclassical theory.

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