{
  "abstract": "A minimal theory of nonradiative energy transfer from a two-dimensional (2D) moiré exciton to a nearby graphene layer is presented. From Fermi's golden rule the transfer rate is the overlap of the exciton near-field spectrum with the dissipative density response of graphene, weighted by an exciton form factor, and it reproduces the established $\\GET\\propto z^{-4}$ law in the point-dipole limit. A finite exciton size filters out the high-momentum near field once the spacer thickness approaches the transition-polarization radius $R_X$, so the distance dependence of the rate---and of the photoluminescence (PL) quenching---probes the exciton size. A low-momentum expansion shows that, relative to the calibrated point-dipole response of the same bath, this leading correction is set by $R_X$ alone. In the ideal coherent-envelope limit the accompanying giant oscillator strength makes the rate non-monotonic in the exciton size, with a peak near $\\lX\\approx z$. Treating graphene as a gate-tunable bath, Pauli blocking suppresses the interband channel once $2|\\muF|$ approaches $\\hbarω$, partially restoring PL, and a full random-phase-approximation benchmark confirms the normalized interband distance dependence to within a few percent away from the threshold. Mapping the PL observables across the transition-metal dichalcogenide/hexagonal boron nitride/graphene parameter space, we find that a graphene gate acts not as a passive electrostatic element but as a tunable 2D electronic reservoir probed through exciton PL quenching.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: J. Phys. Soc. Jpn. 95, 104701 (2026)",
  "arxiv": "2606.28591",
  "author_total": 1,
  "authors": [
    {
      "name": "Katsunori Wakabayashi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/976zs2etw9g9a.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.28591",
  "fulltext_url": null,
  "id": "976zs2etw9g9a",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.28591",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mes-hall"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.28591",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-31",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/976zs2etw9g9a.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:31Z",
      "native_id": "2606.28591",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.28591"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Graphene as a Tunable Nonradiative Bath for Moiré Excitons",
  "title_text": "Graphene as a Tunable Nonradiative Bath for Moiré Excitons",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:31Z",
  "url": "https://research.draconitic.com/paper/976zs2etw9g9a",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.7566/jpsj.95.104701",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}