High magnetic field spin-valley-split Shubnikov-de Haas oscillations in a WSe${}_2$ monolayer

Abstract

We study Shubnikov-de Haas oscillations in a p-type WSe${}_2$ monolayer under very high magnetic field. The oscillation pattern is complex due to a large spin and valley splitting, in the non-fully-resolved Landau level regime. Our experimental data can be reproduced with a model in which the main parameter is the ratio between the Zeeman energy and the cyclotron energy. The model takes into account the Landau levels from both valleys with the same Gaussian broadening, which allows to predict the relative amplitude of the resistance oscillation originating from each valley. The Zeeman energy is found to be several times larger than the cyclotron energy. It translates into a large and increasing effective Landé factor as the hole density decreases, in the continuity of the values reported in the literature at lower carrier density.

arXiv comment6 pages, 5 figures. Supplemental Material: 4 pages, 4 figures

References in corpus (20)

• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Atomically thin MoS2: A new direct-gap semiconductor
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Single-Layer MoS2 Phototransistors
• Evolution of Electronic Structure in Atomically Thin Sheets of WS2 and WSe2
• Three-band tight-binding model for monolayers of group-VIB transition metal dichalcogenides
• Magnetic Control of Valley Pseudospin in Monolayer WSe2
• Exciton Diamagnetic Shifts and Valley Zeeman Effects in Monolayer WS${}_2$ and MoS${}_2$ to 65 Tesla
• Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields
• Valley-spin polarized Landau levels in a monolayer semiconductor
• Unconventional Quantum Hall Effect and Tunable Spin Hall Effect in MoS2 Trilayers
• Optical investigation of monolayer and bulk tungsten diselenide (WSe${}_2$) in high magnetic fields
• Interactions and magnetotransport through spin-valley coupled Landau levels in monolayer MoS${}_2$
• Spin- and valley-dependent magneto-optical properties of MoS2
• Density-Dependent Quantum Hall States and Zeeman Splitting in Monolayer and Bilayer WSe${}_2$
• Ambipolar Landau levels and strong band-selective carrier interactions in monolayer WSe${}_2$
• Gate-Tunable Quantum Dot in a High Quality Single Layer MoS${}_2$ Van der Waals Heterostructure
• Probing Landau levels of strongly interacting massive Dirac electrons in layer-polarized MoS${}_2$
• Landau levels and Shubnikov-de Haas oscillations in monolayer transition metal dichalcogenide semiconductors

Cited by in corpus (1)

• Quantum oscillations of valley current driven by microwave irradiation in transition-metal dichalcogenide/ferromagnet hybrids