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説明:

Moiré superlattice created by twist stacking has novel physical properties. These physical properties depend on the twist angle, hence investigation of the twist angle dependency is important for the deep understanding of physical phenomena in moiré superlattice. In this work, negative magnetoresistance owing to weak localization (WL) was investigated in twisted double bilayer graphene (TDBG) as a function of the twist angle. The ratio of the intervalley scattering time to the intravalley scattering time, estimated using the WL formula for bilayer graphene, tended to decrease as the twist angle increased. This feature is qualitatively explained by the enhancement of intervalley scattering due to the reduction of the intervalley distance in the moiré Brillouin zone (BZ) of the TDBG. This indicates that WL in the TDBG occurs for the moiré superlattice with the reconstructed BZ.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Negative magnetoresistance, weak localization, twist angle

刊行年月日: 2022-10-01

出版者: IOP Publishing

掲載誌:

• Japanese Journal of Applied Physics (ISSN: 13474065) vol. 61 issue. 10 100907

研究助成金:

• Japan Society for the Promotion of Science JP20H01860

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.35848/1347-4065/ac934a

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更新時刻: 2025-02-26 12:30:43 +0900

MDRでの公開時刻: 2025-02-26 12:30:43 +0900