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Spin filtering in a hybrid ferromagnetic-semiconductor microstructure

J. Wróbel·T. Dietl·A. Lusakowski·G. Grabecki·K. Fronc·R. Hey·K. H. Ploog·H. Shtrikman
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Abstract

We fabricated a hybrid structure in which cobalt and permalloy micromagnets produce a local in-plane spin-dependent potential barrier for high-mobility electrons at the GaAs/AlGaAs interface. Spin effects are observed in ballistic transport in the tens' millitesla range of the external field, and are attributed to switching between Zeeman and Stern-Gerlach modes -- the former dominating at low electron densities.

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J. Wróbel, T. Dietl, A. Lusakowski, G. Grabecki, K. Fronc, R. Hey, K. H. Ploog, H. Shtrikman. 2004-04-13. Spin filtering in a hybrid ferromagnetic-semiconductor microstructure. https://doi.org/10.1103/physrevlett.93.246601

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