{
  "id": "1205.5272",
  "version": "v2",
  "published": "2012-05-23T20:00:04.000Z",
  "updated": "2012-10-22T20:05:38.000Z",
  "title": "Screening and collective modes in gapped bilayer graphene",
  "authors": [
    "C. Triola",
    "E. Rossi"
  ],
  "comment": "4 pages, 5 figures. Published version",
  "journal": "Phys. Rev. B 86, 161408(R) (2012)",
  "doi": "10.1103/PhysRevB.86.161408",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We study the static and dynamic screening of gapped bilayer graphene. Unlike previous works we use the 4-band model instead of the simplified 2-band model. We find that there are important qualitative differences between the dielectric screening function obtained using the 2-band and that obtained using the 4-band model. In particular within the 4-band model in the presence of a band-gap the static screening exhibits Kohn anomalies that are absent within the 2-band model. Moreover, using the 4-band model, we are able to examine the effect of trigonal warping (absent in the 2-band model) on the screening properties of bilayer graphene. We also find that the plasmon modes have qualitatively different character in the 4-band model compared to 2-band results.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2012-10-22T20:05:38.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "72.80.Vp",
      "71.10.-w",
      "71.45.Gm",
      "73.21.-b"
    ],
    "keywords": [
      "gapped bilayer graphene",
      "collective modes",
      "plasmon modes",
      "important qualitative differences"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2012,
      "month": "Oct",
      "volume": 86,
      "number": 16,
      "pages": 161408
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvB..86p1408T"
    }
  }
}