Spin extraction theory and its relevance to spintronics

Details Spin extraction theory and its relevance to spintronics Spin extraction theory and its relevance to spintronics

2006-09-02

arxiv.org/abs/cond-mat/0609045v2

Phys. Rev. Lett. 98, 046602 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 two column pages, 3 figures, major revisions to improve the presentation. in addition, the new version includes an electrica

Scientific paper

10.1103/PhysRevLett.98.046602

Extraction of electrons from a semiconductor to a ferromagnet as well as the case of injection in the reverse direction may be formulated as a scattering theory. However, the presence of bound states at the interface arising out of doping on the semiconductor side must be taken into account in the scattering theory. Inclusion of the interface states yields an explanation of a recent result of spin imaging measurement which contradicts the current understanding of spin extraction. The importance of an extraction theory to spintronics is illustrated by an application to a spin switch.

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