Topological Nonlinear Anomalous Nersnt Effect in Strained Transition Metal Dichalcogenides

Abstract

We theoretically analyze the non-linear anomalous Nernst effect as the second-order response of temperature gradient by using the semiclassical framework of electron dynamics. We find that a non-linear current can be generated transverse to the applied temperature gradient in time-reversal-symmetry materials with broken inversion symmetry. This effect has a quantum origin arising from the Berry curvature of states near the Fermi surface. We discuss the non-linear Nernst effect in transition metal dichalcogenides~(TMDCs) under the application of uniaxial strain. In particular, we predict that under fixed chemical potential in TMDCs, the non-linear Nernst current exhibits a transition from ${\text{j}}_{\text{A}}^{\text{dip}}\sim T^{-2}$ temperature dependence in low temperature regime to a linear $T$-dependence in high temperature.

5 pages, 2 figures

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Cited by in corpus (2)

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