Spin blockade at semiconductor/ferromagnet junctions | Zendy

Yuriy V. Pershin | Zendy; Massimiliano Di Ventra | Zendy

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Spin blockade at semiconductor/ferromagnet junctions

Author(s) -

Yuriy V. Pershin,

Massimiliano Di Ventra

Publication year - 2007

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.75.193301

Subject(s) - condensed matter physics , ferromagnetism , spin (aerodynamics) , semiconductor , electron , spinplasmonics , spin hall effect , spin polarization , physics , materials science , optoelectronics , quantum mechanics , thermodynamics

We study theoretically extraction of spin-polarized electrons at nonmagneticsemiconductor/ferromagnet junctions. The outflow of majority spin electronsfrom the semiconductor into the ferromagnet leaves a cloud of minority spinelectrons in the semiconductor region near the junction, forming a localspin-dipole configuration at the semiconductor/ferromagnet interface. Thisminority spin cloud can limit the majority spin current through the junctioncreating a pronounced spin-blockade at a critical current. We calculate thecritical spin-blockade current in both planar and cylindrical geometries anddiscuss possible experimental tests of our predictions.Comment: to be published in PR

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