On phonon-wind-driven spin injection and the conductivity mismatch problem |
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Authors: | R. N. Gurzhi A. N. Kalinenko A. I. Kopeliovich A. V. Yanovsky |
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Affiliation: | (1) Verkin Institute for Low-Temperature Physics and Engineering, Kharkov, 61103, Ukraine |
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Abstract: | Spin injection from a ferromagnetic metal into a semiconductor driven by a constant phonon flow is considered. It is shown that diffusive (as opposed to electrical) spin injection gives rise to a highly spin-polarized current through the semiconductor. In other words, phonon-wind-driven injection under certain conditions eliminates the conductivity mismatch responsible for reduced spin polarization of the electric current injected from a ferromagnetic metal into a semiconductor. |
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