{
  "abstract": "The edge modes of spin-singlet fractional quantum Hall (FQH) phases are manifestations of multicomponent topological order and SU(2) spin symmetry. An archetype is the spin-unpolarized state at $ν$=2/3, whose edge is expected to host spatially coexisting yet counter-propagating charge and neutral spin modes. Despite efforts, its edge properties, including spin coherence and spin-charge separation, have remained elusive owing to the difficulty of resolving spins in FQH edge transport. Here, we develop a spin-sensitive probe of graphene FQH edges by using a p-n junction to interface a target FQH state with a probe integer quantum Hall (QH) state of opposite polarity. An Aharonov-Bohm (AB) interferometer forms along the interface, when the target and probe edge channels carry the same spin. We identify the spin-unpolarized and polarized edges of the $ν$=2/3 states at lower and higher magnetic fields, respectively, through spin-dependent interference. A novel multiparticle AB interference between two electrons of opposite spin emerges from spin-charge separation and recombination on the unpolarized edge, featuring a spin swap. Our results establish edge transport as a probe of spin-singlet topological orders, with implications for parafermion platforms in graphene-superconductor hybrids.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.01233",
  "author_total": 10,
  "authors": [
    {
      "name": "R. Ayache"
    },
    {
      "name": "K. Kim"
    },
    {
      "name": "M. Kuiri"
    },
    {
      "name": "Q. Benichou"
    },
    {
      "name": "H. Chakraborti"
    },
    {
      "name": "L. Pugliese"
    },
    {
      "name": "K. Watanabe"
    },
    {
      "name": "T. Taniguchi"
    },
    {
      "name": "H. -S. Sim"
    },
    {
      "name": "P. Roulleau"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0d95rkwx1xehj.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.01233",
  "fulltext_url": null,
  "id": "0d95rkwx1xehj",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.01233",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mes-hall"
    ],
    [
      "openalex",
      "3107|Quantum and electron transport phenomena"
    ]
  ],
  "openalex": "W7206184567",
  "pdf_url": "https://arxiv.org/pdf/2609.01233",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0d95rkwx1xehj.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:00Z",
      "native_id": "2609.01233",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.01233"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Interferometry reveals spin-singlet fractional quantum Hall edges in graphene",
  "title_text": "Interferometry reveals spin-singlet fractional quantum Hall edges in graphene",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:00Z",
  "url": "https://research.draconitic.com/paper/0d95rkwx1xehj",
  "venue": "arXiv",
  "versions": []
}