Critical spin fluctuation mechanism for the spin Hall effect

Abstract

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 $4d$ or $5d$ metallic compounds.

5 pages for the main text with 4 figures, and 5 pages with 1 figure for the supplementary material

References in corpus (4)

• Evolution of the spin Hall effect in Pt nanowires: Size and temperature effects
• Enhanced spin Hall effect by resonant skew scattering in orbital-selective Kondo effect
• The spin Hall effect as a probe of nonlinear spin fluctuations
• Temperature dependence of side-jump spin Hall conductivity

Cited by in corpus (7)

• Spin Hall effect in a spin-1 chiral semimetal
• Observation of Fluctuation Spin Hall Effect in Antiferromagnet
• Impact of novel electron-phonon coupling mechanisms on valley physics in two-dimensional materials
• Spin Hall effect generated by fluctuating vortices in type-II superconductors
• Spin phase detection by spin current in a chiral helimagnet
• Critical enhancement of the spin Hall effect by spin fluctuations
• The spin Hall effect