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Description:

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.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Negative magnetoresistance, weak localization, twist angle

Date published: 2022-10-01

Publisher: IOP Publishing

Journal:

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

Funding:

• Japan Society for the Promotion of Science JP20H01860

Manuscript type: Publisher's version (Version of record)

MDR DOI:

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

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Updated at: 2025-02-26 12:30:43 +0900

Published on MDR: 2025-02-26 12:30:43 +0900