{
  "id": "1403.0496",
  "version": "v3",
  "published": "2014-03-03T17:34:59.000Z",
  "updated": "2014-07-27T14:13:13.000Z",
  "title": "Origin of band gaps in graphene on hexagonal boron nitride",
  "authors": [
    "Jeil Jung",
    "Ashley DaSilva",
    "Allan H. MacDonald",
    "Shaffique Adam"
  ],
  "comment": "16 pages 15 figures. This version corrects minor numerical errors",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Recent progress in preparing well controlled 2D van der Waals heterojunctions has opened up a new frontier in materials physics. In this paper we address the intriguing energy gaps that are sometimes observed when a graphene sheet is placed on a hexagonal boron nitride substrate, demonstrating that they are produced by an interesting interplay between structural and electronic properties, including electronic many-body exchange interactions. Our theory is able to explain the observed gap behavior by accounting first for the structural relaxation of graphene's carbon atoms when placed on a boron nitride substrate and then for the influence of the substrate on low-energy $\\pi$-electrons located at relaxed carbon atom sites. The methods we employ can be applied to many other van der Waals heterojunctions.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2014-07-27T14:13:13.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hexagonal boron nitride",
      "band gaps",
      "boron nitride substrate",
      "2d van der waals heterojunctions",
      "electronic many-body exchange interactions"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1038/ncomms7308",
      "journal": "Nature Communications",
      "year": 2015,
      "month": "Feb",
      "volume": 6,
      "pages": 6308
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015NatCo...6E6308J"
    }
  }
}