Enhanced Spin Hall Effect by Resonant Skew Scattering in the Orbital-Dependent Kondo Effect
Enhanced Spin Hall Effect by Resonant Skew Scattering in the Orbital-Dependent Kondo Effect
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DOI：
10.1103/physrevlett.102.036401
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发表时间：
2009-01-23
影响因子：
8.6
通讯作者：
Nagaosa, Naoto
中科院分区：
文献类型：
--
作者：
Guo, Guang-Yu;Maekawa, Sadamichi;Nagaosa, Naoto
The enhanced spin Hall effect in Au metal due to the resonant skew scattering is studied with first-principles band structure calculations. Especially the gigantic spin Hall angle gamma(S)congruent to 0.1 observed recently [T. Seki , Nature Mater. 7, 125 (2008)] is attributed to the orbital-dependent Kondo effect of Fe in the Au host metal, where the t(2g) orbitals are in the mixed-valence region while e(g) orbitals are in the Kondo limit. The enhanced spin-orbit interaction by the electron correlation in the t(2g) orbitals leads to the gigantic spin Hall effect. Impurities with 5d orbitals are also discussed.
