Density-Dependent Quantum Hall States and Zeeman Splitting in Monolayer and Bilayer WSe${}_2$

Abstract

We report a study of the quantum Hall states (QHSs) sequence of holes in mono- and bilayer WSe${}_2$. The QHSs sequence transitions between predominantly even and predominantly odd filling factors as the hole density is tuned in the range $1.6-12\times 10^{12}$ cm${}^{-2}$. The QHSs sequence is insensitive to the transverse electric field, and tilted magnetic field measurements reveal an insensitivity of the QHSs sequence to the in-plane magnetic field, evincing that the hole spin is locked perpendicular to the WSe${}_2$ plane. These observations imply that the QHSs sequence is controlled by the Zeeman-to-cyclotron energy ratio, which remains constant as a function of perpendicular magnetic field at a fixed carrier density, but changes as a function of density due to strong electron-electron interaction.

arXiv comment5 pages, 4 figures

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• Integer and Fractional Quantum Hall effect in Ultra-high Quality Few-layer Black Phosphorus Transistors
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• Probing Landau levels of strongly interacting massive Dirac electrons in layer-polarized MoS${}_2$
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• Tunable spin and valley excitations of correlated insulators in $\Gamma$-valley moiré bands
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• Direct Optical-Structure Correlation in Atomically Thin Dichalcogenides and Heterostructures
• Possible Realization and Protection of Valley-Polarized Quantum Hall Effect in Mn/WS2
• Valley-Filling Instability and Critical Magnetic Field for Interaction-Enhanced Zeeman Response in Doped WSe${}_2$ Monolayers
• WSe2/WS2 moiré superlattices: a new Hubbard model simulator
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• Phase Slips and Parity Jumps in Quantum Oscillations of Inverted InAs/GaSb Quantum Wells
• Evidence of the Coulomb gap in the density of states of MoS${}_2$
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• Tutorial: From Topology to Hall Effects -- Implications of Berry Phase Physics
• Quantum oscillations in a hexagonal boron nitride-supported single crystalline InSb nanosheet
• Fabrication and characterization of InSb nanosheet/hBN/graphite heterostructure devices
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