Lattice model for the quantum anomalous Hall effect in moiré graphene
Inspired by experiments on magic angle-twisted bilayer graphene, we present a lattice mean-field model for the quantum anomalous Hall effect in a moiré setting. Our hopping Hamiltonian provides a simple route to a moiré Chern insulator in commensurately twisted systems. We study our model in the ribbon geometry and demonstrate the presence of thick chiral edge states that have a transverse localization that scales with the moiré lattice spacing. We also study the electronic structure of a domain wall between opposite Chern insulators. Our model and results are relevant to experiments that will image or manipulate the moiré quantum anomalous Hall edge states.
© American Physical Society (APS) [Lattice model for the quantum anomalous Hall effect in moiré graphene. Physical Review B 107, 23 (2023)]
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Work Title | Lattice model for the quantum anomalous Hall effect in moiré graphene |
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License | In Copyright (Rights Reserved) |
Work Type | Article |
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Publication Date | June 21, 2023 |
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Deposited | January 06, 2025 |
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