Moving electrons of different spins experience skew scattering in a two-dimensional electron gas layer and the electron deviates different direction due to the spin-dependent deflection. If spin is randomly oriented, the amount of skew scattering on both sides will be same and the Hall voltage will read zero. In this experiment, the carrier concentrations of spin up and down are unbalanced because the spin is aligned by stray field from the ferromagnet. Therefore, the voltage probe reads charge accumulation asymmetry. Spin Hall voltage is functions of the spin alignment direction and the amount of spin polarization. (C) 2006 Elsevier B.V. All rights reserved.
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Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
Delft Univ Technol, Kavli Inst NanoSci, NL-2628 CJ Delft, Netherlands
Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, JapanTohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
Bauer, G. E. W.
Goennenwein, S. T. B.
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Bayer Akad Wissensch, Walther Meissner Inst, D-85748 Garching, GermanyTohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
Goennenwein, S. T. B.
Saitoh, E.
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Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan
Japan Sci & Technol Agcy, CREST, Tokyo 1020076, Japan
Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, JapanTohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan