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

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.

arXiv comment16 pages, 4 figures

References in corpus (22)

• Quantum Spin Hall Effect in Graphene
• Berry Phase Effects on Electronic Properties
• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Valley contrasting physics in graphene: magnetic moment and topological transport
• The Valley Hall Effect in MoS2 Transistors
• Valley Dependent Optoelectronics from Inversion Symmetry Breaking
• Magnetic Control of Valley Pseudospin in Monolayer WSe2
• Valley Zeeman Effect in Elementary Optical Excitations of a Monolayer WSe2
• Breaking of valley degeneracy by magnetic field in monolayer MoSe2
• Spontaneous Quantum Hall States in Chirally-stacked Few-Layer Graphene Systems
• Enhanced valley splitting in monolayer WSe2 due to magnetic exchange field
• Giant and tunable valley degeneracy splitting in MoTe2
• Large spin-orbit splitting of deep in-gap defect states of engineered sulfur vacancies in monolayer WS2
• Detection of valley polarization in graphene by a superconducting contact
• Bound states and magnetic field-induced valley splitting in gate-tunable graphene quantum dots
• Valley Splitting Theory of SiGe/Si/SiGe Quantum Wells
• Valley Polarization by Spin Injection in a Light-Emitting van der Waals Heterojunction
• Giant paramagnetism induced valley polarization of electrons in charge-tunable monolayer MoSe2
• Density-Dependent Quantum Hall States and Zeeman Splitting in Monolayer and Bilayer WSe${}_2$
• Nonquasiparticle states in half-metallic ferromagnet NiMnSb
• Ambipolar Landau levels and strong band-selective carrier interactions in monolayer WSe${}_2$
• Strongly interaction-enhanced valley magnetic response in monolayer WSe2