Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session K56: Twisted Bilayer Graphene: Structure and Emergent Phases
3:00 PM–6:00 PM,
Tuesday, March 15, 2022
Room: Hyatt Regency Hotel -Burnham
Sponsoring Unit: DCMP
Chair: Eslam Khalaf, Harvard University
Abstract: K56.00015 : The moiré distortion effect on the flat band in twisted bilayer graphene.
5:48 PM–6:00 PM
Department of Physics, Osaka University
In the recent experiments, however, it was observed that the moiré pattern of the actual TBG is not perfectly regular but exhibits super-moiré random structure caused by the local strain.
Here, we studied the effect of such a non-uniform distortion of the moiré pattern on the flat band of TBG. We find that the distortion splits the two degenerate flat bands into two separate portions in the energy axis, rather than simply broadening the band. We also show that the splitting width mainly depends on the interlayer-difference in the effective vector potential caused by the lattice distortion.
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