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説明:

Two-dimensional (2D) moiré systems based on twisted bilayer graphene and transition metal dichalcogenides provide a promising platform to investigate emergent phenomena driven by strong electron-electron interactions in partially-filled flat bands1-11. A natural question arises: is it possible to expand the 2D correlated moiré physics to one-dimensional (1D)? This requires selectively doping of 1D moiré chain embedded in the 2D moiré systems, which is an outstanding challenge in experiment and seems to be not within the grasp of today’s technology. Therefore, an experimental demonstration of the 1D moiré chain with partially-filled flat bands remains absent. Here we show that we can introduce 1D boundaries, separating two regions with different twist angles, in twisted bilayer WSe2 (tWSe2) by using scanning tunneling microscopy (STM), and demonstrate that the flat bands of moiré sites along the 1D boundaries can be selectively filled. The charge and discharge states of correlated moiré electrons in the 1D moiré chain can be directly imaged and manipulated by combining a back-gate voltage with the STM bias. Our results open the door for realizing new correlated electronic states of the 1D moiré chain in 2D systems.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: 1D moiré chains, twisted bilayer WSe2, correlated electronic states

刊行年月日: 2024-11-05

出版者: Proceedings of the National Academy of Sciences

掲載誌:

• Proceedings of the National Academy of Sciences (ISSN: 10916490) vol. 121 issue. 45 e2405582121

研究助成金:

• National Natural Science Foundation of China 12141401
• MOST | National Key Research and Development Program of China 2021YFA1401900

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1073/pnas.2405582121

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更新時刻: 2025-03-03 16:30:20 +0900

MDRでの公開時刻: 2025-03-03 16:30:20 +0900