Journal article
Kekulé spirals and charge transfer cascades in twisted symmetric trilayer graphene
- Abstract:
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We study the phase diagram of magic-angle twisted symmetric trilayer graphene in the presence of uniaxial heterostrain and interlayer displacement field. For experimentally reasonable strain, our mean-field analysis finds robust Kekulé spiral order whose doping-dependent ordering vector is incommensurate with the moiré superlattice, consistent with recent scanning tunneling microscopy experiments, and paralleling the behavior of closely related twisted bilayer graphene (TBG) systems. Strikingly, we identify a possibility absent in TBG: the existence of commensurate Kekulé spiral order even at zero strain for experimentally realistic values of the interlayer potential in a trilayer. Our studies also reveal a complex pattern of charge transfer between weakly and strongly dispersive bands in strained trilayer samples as the density is tuned by electrostatic gating, that can be understood intuitively in terms of the “cascades” in the compressibility of magic-angle TBG.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 1022.6KB, Terms of use)
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- Publisher copy:
- 10.1103/physrevb.109.l201119
Authors
- Funder identifier:
- https://ror.org/0472cxd90
- Grant:
- 804213
- Funder identifier:
- https://ror.org/0439y7842
- Grant:
- EP/S020527/1
- Publisher:
- American Physical Society
- Journal:
- Physical Review B More from this journal
- Volume:
- 109
- Issue:
- 20
- Article number:
- L201119
- Publication date:
- 2024-05-16
- Acceptance date:
- 2024-05-03
- DOI:
- EISSN:
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2469-9969
- ISSN:
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2469-9950
- Language:
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English
- Keywords:
- Pubs id:
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2001551
- Local pid:
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pubs:2001551
- Deposit date:
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2024-09-05
Terms of use
- Copyright holder:
- Wang et al.
- Copyright date:
- 2024
- Rights statement:
- Copyright © 2024 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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