{
  "id": "cond-mat/0005086",
  "version": "v1",
  "published": "2000-05-04T09:53:10.000Z",
  "updated": "2000-05-04T09:53:10.000Z",
  "title": "Universal behavior of relaxational heterogeneity in glasses and liquids",
  "authors": [
    "D. Caprion",
    "J. Matsui",
    "H. R. Schober"
  ],
  "categories": [
    "cond-mat.dis-nn"
  ],
  "abstract": "We report an investigation of the heterogeneity in super-cooled liquids and glasses using the non-Gaussianity parameter. We simulate selenium and a binary Lennard-Jones system by molecular dynamics. In the non-Gaussianity three time domains can be distinguished. First there is an increase on the ps-scale due to the vibrational (ballistic) motion of the atoms. This is followed, on an intermediate time-scale, by a growth, due to local relaxations (beta-relaxation) at not too high temperatures. A maximum is reached at times corresponding to long range diffusion (alpha-relaxation). At long times the non-Gaussianity slowly drops, the system becoming homogeneous on these time-scales. In both systems studied, the non-Gaussianity follows in the intermediate time domain, corresponding to the beta-relaxations, a law ~ t^1/2. This general behavior is explained by collective hopping and dynamic heterogeneity. We support this finding by a model calculation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-05-04T09:53:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "universal behavior",
      "relaxational heterogeneity",
      "binary lennard-jones system",
      "intermediate time domain",
      "long range diffusion"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2000cond.mat..5086C"
    }
  }
}