{
  "id": "1111.5413",
  "version": "v1",
  "published": "2011-11-23T06:42:18.000Z",
  "updated": "2011-11-23T06:42:18.000Z",
  "title": "Direct Observation of the Topological Surface States in Lead-Based Ternary Telluride Pb(Bi1-xSbx)2Te4",
  "authors": [
    "S. Souma",
    "K. Eto",
    "M. Nomura",
    "K. Nakayama",
    "T. Sato",
    "T. Takahashi",
    "Kouji Segawa",
    "Yoichi Ando"
  ],
  "comment": "5 pages, 4 figures",
  "journal": "PhysRevLett.108, 116801 (2012)",
  "doi": "10.1103/PhysRevLett.108.116801",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "We have performed angle-resolved photoemission spectroscopy on Pb(Bi1-xSbx)2Te4, which is a member of lead-based ternary tellurides and has been theoretically proposed as a candidate for a new class of three-dimensional topological insulators (TIs). In PbBi2Te4, we found a topological surface state with a hexagonally deformed Dirac-cone band dispersion, indicating that this material is a strong TI with a single topological surface state at the Brillouin-zone center. Partial replacement of Bi with Sb causes a marked change in the Dirac carrier concentration, leading to the sign change of Dirac carriers from n-type to p-type. The Pb(Bi1-xSbx)2Te4 system with tunable Dirac carriers thus provides a new platform for investigating exotic topological phenomena.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-11-23T06:42:18.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.20.-r",
      "71.20.-b",
      "75.70.Tj",
      "79.60.-i"
    ],
    "keywords": [
      "topological surface state",
      "lead-based ternary telluride pb",
      "direct observation",
      "deformed dirac-cone band dispersion",
      "dirac carrier"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2012,
      "month": "Mar",
      "volume": 108,
      "number": 11,
      "pages": 116801
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvL.108k6801S"
    }
  }
}