{
  "abstract": "Electron gases in low-dimensional materials exhibit unusual optical and electronic phenomena arising from reduced dimensionality and enhanced interactions. While such states are typically engineered in quantum-confined systems and heterostructures, they rarely occur in naturally existing materials. Hyperbolic materials provide a unique platform where extreme lattice anisotropy can give rise to unconventional electronic states and electron-phonon interactions, yet experimental probes of their underlying electron dynamics remain limited. Here, we show that angle-resolved polarized Raman spectroscopy reveals anisotropic electron-phonon coupling in MoOCl2, a naturally occurring hyperbolic material whose optical response originates from a highly anisotropic electron gas. Pronounced polarization-dependent Fano line shapes reveal coherent coupling between optical phonons and an anisotropic electronic continuum. A microscopic model quantitatively reproduces the Raman spectra and identifies a distinct spectroscopic fingerprint of the anisotropic electron gas. Excitation-energy- and thickness-dependent measurements further reveal a tunable continuum with weak interlayer coupling. Our results establish Raman spectroscopy as a sensitive probe of electron-phonon interactions in naturally hyperbolic materials and anisotropic electron gases. Low-dimensional electron gases can give rise to unusual light-matter interactions, but naturally occurring examples are rare. Here, the authors show that Raman spectroscopy reveals a unique fingerprint of the strongly anisotropic electron gas in the hyperbolic material MoOCl2 through its interaction with lattice vibrations.",
  "abstract_shown": true,
  "affiliations": [
    "Centre for Nano Science and Technology, Fondazione Istituto Italiano di Tecnologia, Milano, Italy"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Nicola Melchioni",
      "orcid": "0000-0002-1351-4428"
    },
    {
      "affs": [
        0
      ],
      "name": "Andrea Mancini",
      "orcid": "0000-0001-5927-9032"
    },
    {
      "affs": [
        0
      ],
      "name": "Antonio Ambrosio",
      "orcid": "0000-0002-8519-3862"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/81pxsetges3zt.bib",
  "cited_by": 7,
  "doi": "10.1038/s42005-026-02802-5",
  "fulltext_url": null,
  "id": "81pxsetges3zt",
  "issns": [
    "2399-3650"
  ],
  "landing_url": "https://doi.org/10.1038/s42005-026-02802-5",
  "language": "en",
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|2D Materials and Applications"
    ]
  ],
  "openalex": "W7202078309",
  "pdf_url": "https://www.nature.com/articles/s42005-026-02802-5_reference.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-10",
  "publisher": "Nature Portfolio",
  "ris": "https://research.draconitic.com/paper/81pxsetges3zt.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T13:21:14Z",
      "native_id": "W7202078309",
      "source": "openalex",
      "url": "https://doi.org/10.1038/s42005-026-02802-5"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|2D Materials and Applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Anisotropic electron gas in a hyperbolic van der Waals material",
  "title_text": "Anisotropic electron gas in a hyperbolic van der Waals material",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T13:21:23Z",
  "url": "https://research.draconitic.com/paper/81pxsetges3zt",
  "venue": "Communications Physics",
  "versions": []
}