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arXiv · cond-mat/0701678

Spin blockade at semiconductor/ferromagnet junctions

Yu. V. Pershin·M. Di Ventra
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Abstract

We study theoretically extraction of spin-polarized electrons at nonmagnetic semiconductor/ferromagnet junctions. The outflow of majority spin electrons from the semiconductor into the ferromagnet leaves a cloud of minority spin electrons in the semiconductor region near the junction, forming a local spin-dipole configuration at the semiconductor/ferromagnet interface. This minority spin cloud can limit the majority spin current through the junction creating a pronounced spin-blockade at a critical current. We calculate the critical spin-blockade current in both planar and cylindrical geometries and discuss possible experimental tests of our predictions.

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Yu. V. Pershin, M. Di Ventra. 2007-03-19. Spin blockade at semiconductor/ferromagnet junctions. https://doi.org/10.1103/physrevb.75.193301

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