We propose mechanisms for the spin Hall effect in metallic systems arising from the coupling between conduction electrons and local magnetic moments that are dynamically fluctuating. Both a side-jump-type mechanism and a skew-scattering-type mechanism are considered. In either case, dynamical spin fluctuation gives rise to a nontrivial temperature dependence in the spin Hall conductivity. This leads to the enhancement in the spin Hall conductivity at nonzero temperatures near the ferromagnetic instability. The proposed mechanisms could be observed in 4 d or 5 d metallic compounds.
Physical Review Letters
- Pub Date:
- November 2019
- Condensed Matter - Strongly Correlated Electrons
- 5 pages for the main text with 4 figures, and 5 pages with 1 figure for the supplementary material