Room-Temperature Disorder-Driven Nonlinear Transport in Topological Materials
Abstract
Recent experiments have reported nonlinear signals in topological materials up to room temperature. Here we show that this response stems from extrinsic spin-orbit contributions to both impurity and phonon scattering. While skew scattering dominates at low temperatures, the side jump contribution τ/τβ, where τ, τβ are the momentum and skew scattering times respectively. Consequently side jump exhibits a weak temperature dependence and remains sizable at room temperature. Our results provide a roadmap for engineering nonlinear transport at ambient conditions.
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