{
  "annotation_id": "7a93acbe-ca37-448b-8108-0018a81a4d28",
  "date_created": "2026-03-02T18:01:21.511000Z",
  "date_modified": "2026-03-02T18:01:21.511000Z",
  "file_hash": "0475b5082429851fc87d754a03dbd1e4748eb14bdf8a2cbf01a16e5f0ab2e800",
  "private": false,
  "record": {
    "abstract": "We present the first experimental characterization in molecular fragile\nglassformers of a \u0027prepeak that appears significantly below the main peak of\nthe static structure factor. The temperature and density dependences of this\nprepeak are studied via elastic neutron scattering experiments under high\npressure (up to 300 MPa) in m-toluidine and m-fluoroaniline. The prepeak\nintensity increases with decreasing temperature, but it remains constant with\nincreasing pressure while its position and width stay roughly the same. These\nfeatures are opposite to those observed for the \u0027first sharp diffraction peak\u0027\nof network glasses. The origin of the phenomenon is analyzed with the help of\nMonte Carlo simulations. We associate the prepeak to hydrogen-bond-induced\nheterogeneities (or clusters) whose limited size results from exclusion effect\nbetween benzene rings that prevents the extension of a hydrogen-bond network.\nImplications for the dynamics of the liquid close to the glass transition are\nfinally considered.",
    "arxiv_id": "physics/9805034",
    "authors": [
      "Denis Morineau",
      "Christiane Alba-Simionesco",
      "Marie-Claire Bellissent-Funel",
      "Marie-France Lauthie"
    ],
    "categories": [
      "physics.chem-ph"
    ],
    "doi": "10.1209/epl/i1998-00339-6",
    "title": "Experimental Indication of Structural Heterogeneities in Fragile   Hydrogen-bonded Liquids",
    "url": "https://arxiv.org/abs/physics/9805034"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fbb19e48-2534-4323-87cf-53d9deb963c7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}