Article Chern Insulators at Integer and Fractional Filling in Moiré Pentalayer Graphene

Dacen Waters ; Anna Okounkova ; Ruiheng Su ; Boran Zhou ; Jiang Yao ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Xiaodong Xu ; Ya-Hui Zhang ; Joshua Folk ; Matthew Yankowitz

PhysRevX.15.011045.pdf
Download file (1.72 MB)
Download as zip (1.58 MB)
Collection

Citation
Dacen Waters, Anna Okounkova, Ruiheng Su, Boran Zhou, Jiang Yao, Kenji Watanabe, Takashi Taniguchi, Xiaodong Xu, Ya-Hui Zhang, Joshua Folk, Matthew Yankowitz. Chern Insulators at Integer and Fractional Filling in Moiré Pentalayer Graphene. Physical Review X. 2025, 15 (1), 011045. https://doi.org/10.1103/physrevx.15.011045

Description:

(abstract)

The advent of moiré platforms for engineered quantum matter has led to discoveries of integer and fractional quantum anomalous Hall effects, with predictions for correlation-driven topological states based on electron crystallization. We report an array of trivial and topological insulators formed in a moir ́e lattice of rhomobohedral pentalayer graphene (RPG), including signatures of multiple topological electronic crystal states with Chern numbers of C = 1 at fractional fillings of the moir ́e lattice: ν = 1/4, 1/3, and 2/3. At ν = 2/3 the system exhibits an integer quantum anomalous Hall effect at zero magnetic field, but further develops an incipient C = 2/3 fractional Chern insulator in a modest field. Our results establish moir ́e RPG as a fertile platform for studying the competition and potential intertwining of integer and fractional Chern insulators

Rights:

Keyword: Chern insulators, moiré pentalayer graphene
, fractional filling

Date published: 2025-02-27

Publisher: American Physical Society (APS)

Journal:

  • Physical Review X (ISSN: 21603308) vol. 15 issue. 1 011045

Funding:

  • Energy Frontier Research Centers
  • U.S. Department of Energy
  • Office of Science
  • Basic Energy Sciences DE-SC0019443
  • Natural Sciences and Engineering Research Council of Canada
  • Canada Foundation for Innovation
  • Canadian Institute for Advanced Research
  • University of British Columbia
  • Canada First Research Excellence Fund
  • H2020 European Research Council
  • Horizon 2020 Framework Programme 951541
  • Oak Ridge Institute for Science and Education
  • Office of the Director of National Intelligence
  • Clean Energy Institute
  • Japan Society for the Promotion of Science 21H05233
  • Japan Society for the Promotion of Science 23H02052
  • Ministry of Education, Culture, Sports, Science and Technology
  • National Science Foundation DMR-2041972
  • National Science Foundation DMR-2237031
  • Materials Research Science and Engineering Center, Harvard University 2308979
  • M.J. Murdock Charitable Trust
  • Quantum Materials and Future Technologies Program
  • World Premier International Research Center Initiative

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1103/physrevx.15.011045

Related item:

Other identifier(s):

Contact agent:

Updated at: 2026-02-16 16:31:03 +0900

Published on MDR: 2026-02-16 13:57:33 +0900

Filename Size
Filename PhysRevX.15.011045.pdf (Thumbnail)
application/pdf 		Size 1.72 MB Detail