Gate-Tunable Band Edge in Few-Layer MoS<sub>2</sub>
Transition metal dichalcogenides (TMDs) have garnered significant research interest due to the variation in band edge locations within the hexagonal Brillouin zone between single-layer and bulk configurations. In monolayers, the conduction band minima are centered at the <i>K</i> points, whereas in multilayers, they shift to the <i>Q</i> points, midway between the Γ and <i>K</i> points. In this study, we conduct magnetotransport experiments to measure the occupation in the <i>Q</i> and <i>K</i> valleys in four-layer molybdenum disulfide (MoS<sub>2</sub>). We demonstrate electrostatic tunability of the conduction band edge by combining our experimental results with a hybrid <i>k</i>·<i>p</i> tight-binding model that accounts for interlayer screening effects in a self-consistent manner. Furthermore, we extend our model to bilayer and trilayer MoS<sub>2</sub>, reconciling prior experimental results and quantifying the tunable range of band edges in atomically thin TMDs.
Authors
- Isaac Soltero (ORCID: https://orcid.org/0000-0002-2593-0891)
- Vladimir I. Fal’ko (ORCID: https://orcid.org/0000-0003-0828-0310)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- James G. McHugh (ORCID: https://orcid.org/0000-0001-8509-4883)
- Thomas Ihn (ORCID: https://orcid.org/0000-0002-5587-6953)
- Alexander Schmidhuber (ORCID: https://orcid.org/0000-0002-2241-5480)
- Michele Masseroni (ORCID: https://orcid.org/0000-0003-1663-8239)
- K. Ensslin (ORCID: https://orcid.org/0000-0001-7007-6949)
- I. V. Rozhansky (ORCID: https://orcid.org/0000-0001-9391-9304)
- Markus Niese
- Xue Li (ORCID: https://orcid.org/0000-0003-4409-6799)
Institutions
- Solid State Physics Laboratory (IN)
- National Institute for Materials Science (JP)
- University of Manchester (GB)
- Henry Royce Institute (GB)
- ETH Zurich (CH)
- Quantum (Australia) (AU)
Publication Details
- Journal
- Nano Letters
- Published
- 2025-06-22
- DOI
- https://doi.org/10.1021/acs.nanolett.5c01998
- Citations
- 1
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.52
Funders
- Lloyd's Register Foundation
- Graphene Flagship
- Leverhulme Trust
- University of Manchester
- Ministry of Education, Culture, Sports, Science and Technology
- Eidgenössische Technische Hochschule Zürich
- Engineering and Physical Sciences Research Council
- Japan Society for the Promotion of Science
- National Center of Competence in Research Quantum Science and Technology
- Core Research for Evolutional Science and Technology
- H2020 European Research Council