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Phys Rev Lett. 2012 Oct 12;109(15):156602. Epub 2012 Oct 9.

Giant spin Hall effect induced by skew scattering from bismuth impurities inside thin film CuBi alloys.

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Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba, Japan.


We demonstrate that a giant spin Hall effect (SHE) can be induced by introducing a small amount of Bi impurities in Cu. Our analysis, based on a new three-dimensional finite element treatment of spin transport, shows that the sign of the SHE induced by the Bi impurities is negative and its spin Hall (SH) angle amounts to -0.24. Such a negative large SH angle in CuBi alloys can be explained by applying the resonant scattering model proposed by Fert and Levy [Phys. Rev. Lett. 106, 157208 (2011)] to 6p impurities.

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