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 jAdip∼T−2 temperature dependence in low temperature regime to a linear T-dependence in high temperature.
@article{arxiv.1903.00814,
title = {Topological Nonlinear Anomalous Nersnt Effect in Strained Transition Metal Dichalcogenides},
author = {Xiao-Qin Yu and Zhen-Gang Zhu and Jhih-Shih You and Tony Low and Gang Su},
journal= {arXiv preprint arXiv:1903.00814},
year = {2019}
}