Enhanced spin Hall effect by resonant skew scattering in orbital-selective Kondo effect

Abstract

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.

References in corpus (5)

• Dissipationless Quantum Spin Current at Room Temperature
• Direct electronic measurement of the spin Hall effect
• Universal Scaling Behavior of Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets
• Intrinsic vs. extrinsic anomalous Hall effect in ferromagnets
• Theory of Spin Hall conductivity in n-doped GaAs

Cited by in corpus (3)

• Negative nonlocal resistance in mesoscopic gold Hall bars: Absence of giant spin Hall effect
• Giant Extrinsic Spin Hall Effect due to Rare-Earth Impurities
• Enhanced spin Hall effect by tuning antidot potential: Proposal for a spin filter