Journal article
Domain wall competition in the Chern insulating regime of twisted bilayer graphene
- Abstract:
- We consider magic-angle twisted bilayer graphene (TBG) at filling $\nu=+3$, where experiments have observed a robust quantized anomalous Hall effect. This has been attributed to the formation of a valley- and spin-polarized Chern insulating ground state that spontaneously breaks time-reversal symmetry, and is stabilized by a hexagonal boron nitride (hBN) substrate. We identify three different types of domain wall, and study their properties and energetic selection mechanisms via theoretical arguments and Hartree-Fock calculations adapted to deal with inhomogeneous moir\'e systems. We comment on the implications of these results for transport and scanning probe experiments.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, 10.4MB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevB.104.115404
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review B: Condensed Matter and Materials Physics More from this journal
- Volume:
- 104
- Article number:
- 115404
- Publication date:
- 2021-09-02
- Acceptance date:
- 2021-08-16
- DOI:
- EISSN:
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1550-235X
- ISSN:
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1098-0121
- Language:
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English
- Keywords:
- Pubs id:
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1138074
- Local pid:
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pubs:1138074
- Deposit date:
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2021-08-19
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2021
- Rights statement:
- © 2021 American Physical Society
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from American Physical Society at: https://doi.org/10.1103/PhysRevB.104.115404
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