{
  "abstract": "We reveal deep changes in the phonon dynamics of a sapphire crystal that occur at room temperature when the surface is simply in contact with a laminar water flow. The dynamic perturbation, identified by inelastic neutron scattering, results in a significant broadening accompanied by slight softening of the transverse Alumina acoustic phonons. This flow-induced anharmonicity propagates deep into the crystal and manifests with both light and heavy water flows, albeit with clear differences. This new effect indicating subsonic anharmonic phonon propagation complements previously identified supersonic effects revealed in another Brillouin zone of the crystal. The flow impact is of comparable in magnitude to known anharmonic effects induced by intense electric fields, temperature, or hydrostatic pressure.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "name": "Max Warburton"
    },
    {
      "name": "Philippe Bourges"
    },
    {
      "name": "Alexandre Ivanov"
    },
    {
      "name": "Laurence Noirez"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/14rfk84ndcfyq.bib",
  "cited_by": 0,
  "doi": null,
  "fulltext_url": null,
  "id": "14rfk84ndcfyq",
  "issns": [],
  "landing_url": "https://hal.science/hal-05798113v1",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.math"
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      "hal",
      "0.phys"
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  "openalex": null,
  "pdf_url": "https://hal.science/hal-05798113/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/14rfk84ndcfyq.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:56Z",
      "native_id": "hal-05798113",
      "source": "hal",
      "url": "https://hal.science/hal-05798113v1"
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  "subjects": [
    {
      "field": "mathematics",
      "origin": "hal:0.math",
      "subfield": "general"
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    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Phonon Anharmonicity induced in Bulk Sapphire by a Laminar Water Flow",
  "title_text": "Phonon Anharmonicity induced in Bulk Sapphire by a Laminar Water Flow",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:56Z",
  "url": "https://research.draconitic.com/paper/14rfk84ndcfyq",
  "venue": "HAL",
  "versions": []
}