{
  "id": "1204.2642",
  "version": "v2",
  "published": "2012-04-12T07:42:02.000Z",
  "updated": "2012-04-13T05:22:10.000Z",
  "title": "Evidence for Dirac Fermions in a honeycomb lattice based on silicon",
  "authors": [
    "Lan Chen",
    "Cheng-Cheng Liu",
    "Baojie Feng",
    "Xiaoyue He",
    "Peng Cheng",
    "Zijing Ding",
    "Sheng Meng",
    "Yugui Yao",
    "Kehui Wu"
  ],
  "comment": "6 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Silicene, a sheet of silicon atoms in a honeycomb lattice, was proposed to be a new Dirac-type electron system similar as graphene. We performed scanning tunneling microscopy and spectroscopy studies on the atomic and electronic properties of silicene on Ag(111). An unexpected $\\sqrt{3}\\times \\sqrt{3}$ reconstruction was found, which is explained by an extra-buckling model. Pronounced quasi-particle interferences (QPI) patterns, originating from both the intervalley and intravalley scattering, were observed. From the QPI patterns we derived a linear energy-momentum dispersion and a large Fermi velocity, which prove the existence of Dirac Fermions in silicene.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2012-04-13T05:22:10.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.22.-f",
      "61.48.-c",
      "68.37.Ef",
      "71.20.Mq"
    ],
    "keywords": [
      "honeycomb lattice",
      "dirac fermions",
      "dirac-type electron system similar",
      "large fermi velocity",
      "linear energy-momentum dispersion"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevLett.109.056804",
      "journal": "Physical Review Letters",
      "year": 2012,
      "month": "Aug",
      "volume": 109,
      "number": 5,
      "pages": "056804"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvL.109e6804C"
    }
  }
}