Weak localization on moiré superlattice in twisted double bilayer graphene
arXiv:2203.05223 · doi:10.35848/1347-4065/ac934a
Abstract
Moiré superlattice created by twist stacking has multiple 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.
arXiv comment3 figures
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