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In the twisted trilayer graphene (tTLG) platform, the rich beating patterns between the three graphene layers give rise to a plethora of new length scales and reconstructed electronic bands arising from the emergent moiré and moiré-of-moiré superlattices. The coexisting lattices and superlattices interact and compete with each other to determine the overall transport properties of tTLG, the hierarchy of which can be electrostatically controlled by tuning the out-of-plane charge distribution or layer polarization. In this work, we measure the stability diagram of layer-polarized quantum Hall states in tTLG by systematically mapping out layer-specific Chern numbers in each layer and intra- and interlayer Chern transitions as a function of displacement field D and total carrier density n. In contrast to twisted bilayer systems, the rich interplay between the three atomic layers gives rise to a complex layer-polarized stability diagram with unconventional transport features that evolve rapidly with electric and magnetic fields. The stability diagram quantitatively characterizes the interlayer screening and charge distribution in tTLG with implication of strong interatomic-layer Coulomb coupling. Our work provides comprehensive guidance and insights into predicting and controlling layer-polarization and interlayer transitions in tTLG, and for tuning the individual role and interactions of each participating constituent toward novel material properties.

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• In Copyright
  

  This document is the Accepted Manuscript version of a Published Article that appeared in final form in The Journal of Physical Chemistry Letters, copyright © 2025 American Chemical Society. To access the final published article, see https://doi.org/10.1021/acs.jpclett.5c01221.

Keyword: Twisted trilayer graphene, Quantum Hall states, Moiré superlattice

Date published: 2025-08-07

Publisher: American Chemical Society (ACS)

Journal:

• The Journal of Physical Chemistry Letters (ISSN: 19487185) vol. 16 issue. 31 p. 7990-7997

Funding:

• Ministry of Education, Culture, Sports, Science and Technology
• Japan Society for the Promotion of Science 20H00354
• Japan Society for the Promotion of Science 21H05233
• Japan Society for the Promotion of Science 23H02052
• Division of Materials Research DMR-1922165

Manuscript type: Author's version (Accepted manuscript)

MDR DOI:

First published URL: https://doi.org/10.1021/acs.jpclett.5c01221

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Updated at: 2026-07-03 08:47:53 +0900

Published on MDR: 2026-07-30 08:29:13 +0900