Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-09-17
Phys. Rev. Lett. 102, 036401 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
10.1103/PhysRevLett.102.036401
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 $\gamma_S \cong 0.1$ observed recently (T.Seki et al., Nature Materials {\bf 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.
Guo Guang Yu
Maekawa Sadamichi
Nagaosa Naoto
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