We study the quantum nonlinear Hall effect in two-dimensional materials with time-reversal symmetry. When only one mirror line exists, a transverse charge current occurs in second-order response to an external electric field, as a result of the Berry curvature dipole in momentum space. Candidate 2D materials to observe this effect are two-dimensional transition-metal dichalcogenides~(TMDCs). First we use an ab initio based tight-binding approach to demonstrate that monolayer Td-stricture TMDCs exhibit a finite Berry curvature dipole. In the 1H and 1T′ phase of TMDCs, we show the emergence of finite Berry curvature dipole with the application of strain and electrical displacement field respectively.
@article{arxiv.1805.02157,
title = {Berry curvature dipole current in transition metal dichalcogenides family},
author = {Jhih-Shih You and Shiang Fang and Su-Yang Xu and Efthimios Kaxiras and Tony Low},
journal= {arXiv preprint arXiv:1805.02157},
year = {2018}
}