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説明:

Vertical van der Waals heterostructures of semiconducting transition metal dichalcogenides realize moiré systems with rich correlated electron phases and moiré exciton phenomena. For material combinations with small lattice mismatch and twist angles as in MoSe2-WSe2, however, lattice reconstruction eliminates the canonical moiré pattern and instead gives rise to arrays of peri- odically reconstructed nanoscale domains and mesoscopically extended areas of one atomic registry. Here, we elucidate the role of atomic reconstruction in MoSe2-WSe2 heterostruc- tures synthesized by chemical vapor deposition. With complementary imaging down to the atomic scale, simulations, and optical spectroscopy methods we identify the coexistence of moiré-type cores and extended moiré-free regions in heterostacks with parallel and antiparallel alignment. Our work highlights the potential of chemical vapor deposition for applications requiring moiré-free uniform systems and moiré-type exciton-confining arrays.

権利情報:

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

キーワード: van der Waals heterostructures, atomic reconstruction, chemical vapor deposition

刊行年月日: 2023-05-24

出版者: American Chemical Society (ACS)

掲載誌:

• Nano Letters (ISSN: 15306984) vol. 23 issue. 10 p. 4160-4166

研究助成金:

• World Health Organization
• Army Research Office W911NF-21-2-0147
• Munich Center for Quantum Science and Technology
• Alexander von Humboldt-Stiftung
• Division of Materials Research 1922172
• Japan Society for the Promotion of Science 21H05233
• Japan Society for the Promotion of Science 20H00354
• Bundesministerium f?r Bildung und Forschung
• Division of Materials Research DMR-1231319
• Deutsche Forschungsgemeinschaft EXC-2089-390776260
• Deutsche Forschungsgemeinschaft EXC-2111-390814868
• Bayerische Staatsregierung
• Deutsche Forschungsgemeinschaft SPP 2244 2DMP
• H2020 Marie Sklodowska-Curie Actions 754388
• Marie Sklodowska-Curie Actions 101058981
• Japan Society for the Promotion of Science 19H05790
• China Scholarship Council 201808140196
• Ludwig-Maximilians-Universit?t M?nchen
• H2020 European Research Council 772195

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/acs.nanolett.2c05094

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更新時刻: 2025-02-26 12:31:05 +0900

MDRでの公開時刻: 2025-02-26 12:31:05 +0900