{
  "id": "0812.1622",
  "version": "v1",
  "published": "2008-12-09T05:54:11.000Z",
  "updated": "2008-12-09T05:54:11.000Z",
  "title": "Topological Insulators at Room Temperature",
  "authors": [
    "Haijun Zhang",
    "Chao-Xing Liu",
    "Xiao-Liang Qi",
    "Xi Dai",
    "Zhong Fang",
    "Shou-Cheng Zhang"
  ],
  "comment": "5 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "Topological insulators are new states of quantum matter with surface states protected by the time-reversal symmetry. In this work, we perform first-principle electronic structure calculations for $Sb_2Te_3$, $Sb_2Se_3$, $Bi_2Te_3$ and $Bi_2Se_3$ crystals. Our calculations predict that $Sb_2Te_3$, $Bi_2Te_3$ and $Bi_2Se_3$ are topological insulators, while $Sb_2Se_3$ is not. In particular, $Bi_2Se_3$ has a topologically non-trivial energy gap of $0.3 eV$, suitable for room temperature applications. We present a simple and unified continuum model which captures the salient topological features of this class of materials. These topological insulators have robust surface states consisting of a single Dirac cone at the $\\Gamma$ point.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2008-12-09T05:54:11.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "topological insulators",
      "perform first-principle electronic structure calculations",
      "topologically non-trivial energy gap",
      "room temperature applications",
      "single dirac cone"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008arXiv0812.1622Z"
    }
  }
}