{
  "id": "0910.3586",
  "version": "v1",
  "published": "2009-10-19T15:19:41.000Z",
  "updated": "2009-10-19T15:19:41.000Z",
  "title": "Friction force on slow charges moving over supported graphene",
  "authors": [
    "K. F. Allison",
    "Z. L. Miskovic"
  ],
  "comment": "13 pages, 5 figures, submitted to Nanotechnology for a special issue related to the NGC 2009 conference (http://asdn.net/ngc2009/index.shtml)",
  "journal": "Nanotechnology, Vol. 21 (2010) p. 134017",
  "doi": "10.1088/0957-4484/21/13/134017",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We provide a theoretical model that describes the dielectric coupling of a 2D layer of graphene, represented by a polarization function in the Random Phase Approximation, and a semi-infinite 3D substrate, represented by a surface response function in a non-local formulation. We concentrate on the role of the dynamic response of the substrate for low-frequency excitations of the combined graphene-substrate system, which give rise to the stopping force on slowly moving charges above graphene. A comparison of the dielectric loss function with experimental HREELS data for graphene on a SiC substrate is used to estimate the damping rate in graphene and to reveal the importance of phonon excitations in an insulating substrate. A signature of the hybridization between graphene's pi plasmon and the substrate's phonon is found in the stopping force. A friction coefficient that is calculated for slow charges moving above graphene on a metallic substrate shows an interplay between the low-energy single-particle excitations in both systems.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-10-19T15:19:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "slow charges moving",
      "friction force",
      "supported graphene",
      "random phase approximation",
      "graphenes pi plasmon"
    ],
    "tags": [
      "conference paper",
      "journal article"
    ],
    "publication": {
      "journal": "Nanotechnology",
      "year": 2010,
      "month": "Apr",
      "volume": 21,
      "number": 13,
      "pages": 134017
    },
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010Nanot..21m4017A"
    }
  }
}