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The conduction band minima of multilayer molybdenum disulfide (MoS2) are expected to be centered at the Q point (midway between the Γ and K points) of the hexagonal Brillouin zone. In this study, we conduct magnetotransport experiments on four-layer MoS2, revealing highly tunable gate-induced K and Q valley populations. By combining our experimental results with a hybrid k · p tight-binding model that accounts for interlayer screening effects in a self-consistent manner, we demonstrate that the conduction band minima of four-layer MoS2 at low gate bias are indeed centered at the Q points. However, as in typical experiments higher gate voltages are applied, charge accumulation in the layer adjacent to the positive gate electrode leads to a transition of the band edge from the Q points to the K points. Additionally, we extend our model to bilayer and three-layer MoS2, successfully reconciling previously reported discrepancies between experimental data and density functional theory calculations.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: MoS2
, band edge, gate-tunable


刊行年月日: 2025-07-02

出版者: American Chemical Society (ACS)

掲載誌:

• Nano Letters (ISSN: 15306984) vol. 25 issue. 26 p. 10472-10477

研究助成金:

• Engineering and Physical Sciences Research Council EP/S030719/1
• Engineering and Physical Sciences Research Council EP/V007033/1
• Eidgen?ssische Technische Hochschule Z?rich
• Leverhulme Trust LTRSF24/100044
• University of Manchester
• Ministry of Education, Culture, Sports, Science and Technology
• Core Research for Evolutional Science and Technology JPMJCR24A5
• National Center of Competence in Research Quantum Science and Technology
• Japan Society for the Promotion of Science 21H05233
• Japan Society for the Promotion of Science 23H02052
• Graphene Flagship
• H2020 European Research Council 95154
• Lloyd's Register Foundation

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/acs.nanolett.5c01998

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更新時刻: 2026-02-18 08:30:19 +0900

MDRでの公開時刻: 2026-02-17 17:57:19 +0900