{
  "abstract": "Reliable temperature measurement is essential for characterizing and engineering two-dimensional (2D) semiconductor devices, yet optical thermometry of 2D materials has so far been demonstrated only over narrow temperature windows spanning a few hundred kelvin. Here, we establish a comprehensive optical thermometry framework for monolayer WS2 from 5~K to 1273~K. We show that: (i) the out-of-plane A1g Raman mode shifts linearly with temperature above 100~K, with a slope of -0.0138 cm^{-1}/K in non-encapsulated WS2 (fitted over 298-1223~K) and a measurably smaller slope of -0.0121 cm^{-1}/K in an hBN-encapsulated sample (fitted over 100-1273~K); (ii) photoluminescence spectra measured over the same 5--1273~K range provide an independent optical indicator of the temperature: the neutral-exciton emission redshifts continuously with temperature and is well described by the semi-empirical Pässler model. The two indicators probe distinct physical mechanisms, lattice anharmonicity and bandgap renormalization, and together provide contact-free thermometry for monolayer WS2 from 5~K to 1273~K, an approach applicable to 2D semiconductors more broadly.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.35214",
  "author_total": 6,
  "authors": [
    {
      "name": "Gyeongjun Lee"
    },
    {
      "name": "Antoine Borel"
    },
    {
      "name": "Takashi Taniguchi"
    },
    {
      "name": "Kenji Watanabe"
    },
    {
      "name": "Fausto Sirotti"
    },
    {
      "name": "Fabian Cadiz"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dpgb1n4h6gajs.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.35214",
  "fulltext_url": null,
  "id": "dpgb1n4h6gajs",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.35214",
  "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.mtrl-sci"
    ],
    [
      "openalex",
      "2505|2D Materials and Applications"
    ]
  ],
  "openalex": "W7223879535",
  "pdf_url": "https://arxiv.org/pdf/2610.35214",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dpgb1n4h6gajs.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.35214",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.35214"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Optical Thermometry in Monolayer WS2: Raman and Photoluminescence Spectroscopy from 5 K to 1273 K",
  "title_text": "Optical Thermometry in Monolayer WS2: Raman and Photoluminescence Spectroscopy from 5 K to 1273 K",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/dpgb1n4h6gajs",
  "venue": "arXiv",
  "versions": []
}