We present a theory of generation or alteration of the electron spin coherence and population in an [Formula presented]-doped semiconductor by reflection at the interface with a ferromagnet. The dependence of the spin reflection on the Schottky barrier height and the doping concentration in the semiconductor was computed for a generic model. The theory provides an explanation for the spontaneous electron spin coherence and nuclear polarization in the semiconductor interfaced with a ferromagnet and associated phenomena recently observed by time-resolved Faraday rotation experiments. The study also points to an alternative approach to spintronics different from spin injection. © 2002 The American Physical Society.
CITATION STYLE
Ciuti, C., McGuire, J. P., & Sham, L. J. (2002). Spin Polarization of Semiconductor Carriers by Reflection off a Ferromagnet. Physical Review Letters, 89(15). https://doi.org/10.1103/PhysRevLett.89.156601
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