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Giant spin Hall effect induced by skew scattering from bismuth impurities inside thin film CuBi alloys
Y Niimi1, Y Kawanishi, D H Wei
1Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba, Japan. niimi@issp.u-tokyo.ac.jp
Abstract:
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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