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arXiv · 1903.00814

Topological Nonlinear Anomalous Nersnt Effect in Strained Transition Metal Dichalcogenides

Xiao-Qin Yu·Zhen-Gang Zhu·Jhih-Shih You·Tony Low·Gang Su
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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 $\textbf{j}^\text{dip}_\text{A}\sim T^{-2}$ temperature dependence in low temperature regime to a linear $T$-dependence in high temperature.

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Xiao-Qin Yu, Zhen-Gang Zhu, Jhih-Shih You, Tony Low, Gang Su. 2019-05-28. Topological Nonlinear Anomalous Nersnt Effect in Strained Transition Metal Dichalcogenides. https://doi.org/10.1103/physrevb.99.201410

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