{
  "id": "cond-mat/0012315",
  "version": "v1",
  "published": "2000-12-17T19:55:11.000Z",
  "updated": "2000-12-17T19:55:11.000Z",
  "title": "Velocity-force characteristics of a driven interface in a disordered medium",
  "authors": [
    "M. Mueller",
    "D. Gorokhov",
    "G. Blatter"
  ],
  "comment": "9 pages, RevTeX, 3 postscript figures",
  "journal": "Phys. Rev. B 63, 184305 (2001)",
  "doi": "10.1103/PhysRevB.63.184305",
  "categories": [
    "cond-mat.dis-nn",
    "cond-mat.stat-mech"
  ],
  "abstract": "Using a dynamic functional renormalization group treatment of driven elastic interfaces in a disordered medium, we investigate several aspects of the creep-type motion induced by external forces below the depinning threshold $f_c$: i) We show that in the experimentally important regime of forces slightly below $f_c$ the velocity obeys an Arrhenius-type law $v\\sim\\exp[-U(f)/T]$ with an effective energy barrier $U(f)\\propto (f_{c}-f)$ vanishing linearly when f approaches the threshold $f_c$. ii) Thermal fluctuations soften the pinning landscape at high temperatures. Determining the corresponding velocity-force characteristics at low driving forces for internal dimensions d=1,2 (strings and interfaces) we find a particular non-Arrhenius type creep $v\\sim \\exp[-(f_c(T)/f)^{\\mu}]$ involving the reduced threshold force $f_c(T)$ alone. For d=3 we obtain a similar v-f characteristic which is, however, non-universal and depends explicitly on the microscopic cutoff.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-12-17T19:55:11.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "disordered medium",
      "driven interface",
      "dynamic functional renormalization group treatment",
      "non-arrhenius type creep",
      "thermal fluctuations soften"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}