Spin filtering in a hybrid ferromagnetic-semiconductor microstructure

Details Spin filtering in a hybrid ferromagnetic-semiconductor microstructure Spin filtering in a hybrid ferromagnetic-semiconductor microstructure

2004-04-13

arxiv.org/abs/cond-mat/0404282v1

Phys. Rev. Lett. Vol.93, 246601 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.93.246601

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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