Fig. 1: Schematic view of the Kondo model.
From: Critical enhancement of the spin Hall effect by spin fluctuations

a Spin dependent scattering by \({{{{\mathcal{F}}}}}_{0,1}\) terms, b anomalous velocity induced by \({{{{\mathcal{F}}}}}_{2}\) terms, and c skew scattering by \({{{{\mathcal{F}}}}}_{3}\) terms. Yellow arrows indicate conduction electrons, and green arrows indicate local moments. In the \({{{{\mathcal{F}}}}}_{2(3)}\) scattering processes, the electron deflection depends on the direction of the local moment (the electron spin), leading to the side-jump (skew-scattering) contribution to σSH. Adapted from Okamoto, S., Egami, T. & Nagaosa, N. Phys. Rev. Lett. 123, 196603 (2019).