{
  "id": "1902.08397",
  "version": "v1",
  "published": "2019-02-22T08:36:54.000Z",
  "updated": "2019-02-22T08:36:54.000Z",
  "title": "Unravelling the electrical properties of epitaxial Graphene nanoribbons",
  "authors": [
    "Zhuocong Xiao",
    "Colm Durkan"
  ],
  "comment": "24 pages, 5 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "The size-dependent electrical resistivity of single-layer graphene ribbons has been studied experimentally for ribbon widths from 16 nm to 320 nm. The experimental findings are that the resistivity follows a more dramatic trend than that seen for metallic nanowires of similar dimensions, due to a combination of surface scattering from the edges, band-gap related effects and shifts in the Fermi level that show a strong width dependence. We show that the Charge Neutrality point switches polarity below a ribbon width of around 50 nm, and that at this point, the thermal coefficient of resistance is a maximum. The majority doping type therefore can be controlled by altering ribbon width. We also demonstrate that an alumina passivation layer has a significant effect on the mean free path of the charge carriers within the graphene, which can be probed directly via measurements of the width-dependent resistivity. We propose a model for conduction that takes edge and confinement effects into account.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-02-22T08:36:54.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "epitaxial graphene nanoribbons",
      "electrical properties",
      "ribbon width",
      "charge neutrality point switches polarity",
      "strong width dependence"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 24,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}