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説明:

Bilayer graphene (BLG) was recently shown to host a band-inverted phase with unconventional topology emerging from the Ising-type spin–orbit interaction (SOI) induced by the proximity of transition metal dichalcogenides with large intrinsic SOI. Here, we report the stabilization of this band-inverted phase in BLG symmetrically encapsulated in tungsten-diselenide (WSe2) via hydro- static pressure. Our observations from low temperature transport measurements are consistent with a single particle model with induced Ising SOI of opposite sign on the two graphene layers. To con- firm the stabilization of the inverted phase, we present thermal activation measurements and show that the SOI-induced band gap increases by more than 100% due to the applied pressure. Finally, the investigation of Landau level spectra reveals the magnetic field dependence of the level-crossings on the applied field, which further confirms the enhancement of SOI with pressure.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Band-inverted phase, Ising-type spin-orbit interaction, hydrostatic pressure

刊行年月日: 2023-10-25

出版者: American Chemical Society (ACS)

掲載誌:

• Nano Letters (ISSN: 15306984) vol. 23 issue. 20 p. 9508-9514

研究助成金:

• European Regional Development Fund 2.3.3-15-2017-00015
• National Research, Development and Innovation Office 2022-2.1.1- NL-2022-00004
• Bolyai Foundation
• H2020 Future and Emerging Technologies
• European Cooperation in Science and Technology CA 21144
• Japan Society for the Promotion of Science 19H05790
• Japan Society for the Promotion of Science 20H00354
• Japan Society for the Promotion of Science 21H05233
• European Social Fund 2.3.3-15-2017-00015
• Innovációs és Technológiai Minisztérium UNKP-22-3-II
• Ministry of National Resources, Hungary K138433
• Ministry of National Resources, Hungary PD134758

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/acs.nanolett.3c03029

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更新時刻: 2025-02-14 16:30:41 +0900

MDRでの公開時刻: 2025-02-14 16:30:42 +0900