By using the first-principles calculations and model analyses, we found that the combination of defected tungsten disulfide monolayer and sparse manganese adsorption may give a KK` valley spin splitting up to 210 meV. This system also has a tunable magnetic anisotropy energy, a clean band gap, and an appropriate band alignment, with the Fermi level sitting right above the top of valence bands at the K-valleys. Therefore, it can be used for the realization of the valley-polarized anomalous Hall effect and for the exploration of other valley related physics without using optical methods. A protective environment can be formed by covering it with a hexagonal BN layer, without much disturbance to the benign properties of Mn/WS2.
@article{arxiv.1902.10653,
title = {Possible Realization and Protection of Valley-Polarized Quantum Hall Effect in Mn/WS2},
author = {Jie Li and Lei Gu and Ruqian Wu},
journal= {arXiv preprint arXiv:1902.10653},
year = {2020}
}