{
  "abstract": "Electron-phonon interactions govern quasiparticle energies, lifetimes, and temperature-dependent band structures in semiconductors. However, direct momentum-resolved experimental evidence of their impact on quasiparticle electronic structure remains scarce, particularly in nitride semiconductors. Here, we present conclusive experimental evidence of electron-phonon interaction-induced quasiparticle renormalization and pronounced spectral broadening in p-type scandium nitride (ScN), using soft x-ray angle-resolved photoemission spectroscopy. First-principles spectral-function calculations due to electron-phonon coupling reproduce the measured spectra, capturing a pronounced quasiparticle kink ~2.3 eV below the valence-band maximum, phonon satellite features arising from long-range electron-phonon coupling, and a direct bandgap zero-point renormalization of -124.3 meV within the non-adiabatic Allen-Heine-Cardona approach. We further show that the anomalous temperature-induced increase in the direct bandgap in ScN originates from the combined effects of thermal expansion and electron-phonon coupling, contributing comparably near room temperature. Our results establish ScN as a model platform for visualizing electron-phonon coupling and provide a quantitative benchmark for predictive first-principles descriptions of quasiparticle renormalization in semiconductors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.33533",
  "author_total": 9,
  "authors": [
    {
      "name": "Sourav Rudra"
    },
    {
      "name": "Dheemahi Rao"
    },
    {
      "name": "Meng-Jie Huang"
    },
    {
      "name": "Subhajit Manna"
    },
    {
      "name": "Renuka Karanje"
    },
    {
      "name": "Aritra Dey"
    },
    {
      "name": "Sanjoy Kr Mahatha"
    },
    {
      "name": "Samuel Poncé"
    },
    {
      "name": "Bivas Saha"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/02159341jbtad.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.33533",
  "fulltext_url": null,
  "id": "02159341jbtad",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.33533",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "3104|GaN-based semiconductor devices and materials"
    ]
  ],
  "openalex": "W7223986307",
  "pdf_url": "https://arxiv.org/pdf/2610.33533",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-24",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/02159341jbtad.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.33533",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.33533"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Phonon-Dressed Quasiparticles in Epitaxial Scandium Nitride Resolved by Soft X-ray ARPES",
  "title_text": "Phonon-Dressed Quasiparticles in Epitaxial Scandium Nitride Resolved by Soft X-ray ARPES",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/02159341jbtad",
  "venue": "arXiv",
  "versions": []
}