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arXiv · 1902.10653

Possible Realization and Protection of Valley-Polarized Quantum Hall Effect in Mn/WS2

Jie Li·Lei Gu·Ruqian Wu
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Abstract

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.

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Jie Li, Lei Gu, Ruqian Wu. 2019-08-22. Possible Realization and Protection of Valley-Polarized Quantum Hall Effect in Mn/WS2. https://doi.org/10.1103/physrevb.101.024412

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