{
  "abstract": "When a Chern band is partially filled, a fractional Chern insulator (FCI)-the lattice analog of a fractional quantum Hall state-can arise. Though the full range of possible scenarios for producing such a state is not established, the most tractable models combine strong electronic interactions with the quantum geometry of the parent Chern band meeting specific criteria. In twisted bilayer graphene, the importance of interactions can be tuned by varying the interlayer twist. Here, we study a sample with twist near 1.4°, large enough to suppress the zero-field correlated states. We find that applying a strong magnetic field restores the importance of electron-electron interactions: at nearly half a magnetic flux quantum per moiré unit cell, deep in the Hofstadter regime, odd-denominator fractional states appear in multiple Hofstadter subbands. These fractional states persist over larger ranges of density, and are more robustly quantized, than nearby integer states, opposite to what is seen in other fractional quantum Hall and FCI systems.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Physics, Stanford University, Stanford, CA 94305.",
    "Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025.",
    "School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China.",
    "National High Magnetic Field Laboratory, Tallahassee, FL 32310.",
    "Research Center for Functional Materials, National Institute for Materials Science, Tsukuba 305-0044, Japan.",
    "International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba 305-0044, Japan.",
    "Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139.",
    "Department of Physics, Florida State University, Tallahassee, FL 32306."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 10,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Joe Finney",
      "orcid": "0000-0001-7166-9754"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Aaron Sharpe"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Linsey K Rodenbach"
    },
    {
      "affs": [
        2
      ],
      "name": "Jian Kang"
    },
    {
      "affs": [
        3
      ],
      "name": "Xiaoyu Wang",
      "orcid": "0000-0002-5035-5761"
    },
    {
      "affs": [
        4
      ],
      "name": "Kenji Watanabe",
      "orcid": "0000-0003-3701-8119"
    },
    {
      "affs": [
        5
      ],
      "name": "Takashi Taniguchi"
    },
    {
      "affs": [
        0,
        1,
        6
      ],
      "name": "Marc A Kastner",
      "orcid": "0000-0001-7641-5438"
    },
    {
      "affs": [
        3,
        7
      ],
      "name": "Oskar Vafek"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "David Goldhaber-Gordon"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6xcb4rfc5tyn0.bib",
  "cited_by": 0,
  "doi": "10.1073/pnas.2602080123",
  "fulltext_url": "https://europepmc.org/articles/PMC13663781",
  "id": "6xcb4rfc5tyn0",
  "issns": [
    "0027-8424",
    "1091-6490"
  ],
  "landing_url": "https://europepmc.org/article/MED/42832671",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3107|Topological Materials and Phenomena"
    ]
  ],
  "openalex": "W7220465608",
  "pdf_url": "https://europepmc.org/articles/PMC13663781?pdf=render",
  "pmcid": "PMC13663781",
  "pmid": "42832671",
  "published": "2026-10-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6xcb4rfc5tyn0.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:10Z",
      "native_id": "MED:42832671",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42832671"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3107|Topological Materials and Phenomena",
      "subfield": "amo"
    }
  ],
  "title": "Extended fractional Hofstadter states at high field in twisted bilayer graphene above the magic angle.",
  "title_text": "Extended fractional Hofstadter states at high field in twisted bilayer graphene above the magic angle.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:10Z",
  "url": "https://research.draconitic.com/paper/6xcb4rfc5tyn0",
  "venue": "Proceedings of the National Academy of Sciences of the United States of America",
  "versions": []
}