{
  "id": "1210.2917",
  "version": "v1",
  "published": "2012-10-10T13:47:36.000Z",
  "updated": "2012-10-10T13:47:36.000Z",
  "title": "A topological crystalline insulator (TCI) phase via topological phase transition and crystalline mirror symmetry",
  "authors": [
    "Su-Yang Xu",
    "Chang Liu",
    "Nasser Alidoust",
    "M Neupane",
    "D. Qian",
    "I. Belopolski",
    "J. D. Denlinger",
    "Y. J. Wang",
    "H. Lin",
    "L. A. Wray",
    "G. Landolt",
    "B. Slomski",
    "J. H. Dil",
    "A. Marcinkova",
    "E. Morosan",
    "Q. Gibson",
    "R. Sankar",
    "F. C. Chou",
    "R. J. Cava",
    "A. Bansil",
    "M. Z. Hasan"
  ],
  "comment": "45 pages, 17 Figures, Earlier observation reported at http://xxx.lanl.gov/abs/1206.2088 (11th June, 2012); Expanded ver.(17 Figs) accepted for publication (in press) in Nature Communications (2012)",
  "journal": "Suyang Xu et.al., Nature Communications 3, 1192 (2012)",
  "doi": "10.1038/ncomms2191",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "A Z2 topological insulator protected by time-reversal symmetry is realized via spin-orbit interaction driven band inversion. For example, the topological phase in the Bi-Sb system is due to an odd number of band inversions. A related spin-orbit system, the (Pb/Sn)Te class, has been known to contain an even number of inversions based on band theory. Here we experimentally investigate the possibility of a mirror symmetry protected topological crystalline insulator phase in the (Pb/Sn)Te class of materials which has been theoretically predicted to exist in its non-alloyed version. Our experimental results show that at a finite-Pb composition above the topological inversion phase transition, the surface exhibits even number of spin-polarized Dirac cone states (as opposed to odd as observed in Bi-Sb alloy or Bi2Se3) revealing mirror protected topological order distinct from that observed in Bi-Sb or Bi2Se3. Our observation of the spin-polarized Dirac surface states in the inverted (Pb/Sn)Te and their absence in the non-inverted compounds related via a topological phase transition (spin-orbit induced band inversion type) provide the experimental groundwork for opening the research on novel topological order in future quantum devices.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-10-10T13:47:36.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "topological phase transition",
      "crystalline mirror symmetry",
      "interaction driven band inversion",
      "protected topological crystalline",
      "topological crystalline insulator phase"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Nature Communications",
      "year": 2012,
      "month": "Nov",
      "volume": 3,
      "pages": 1192
    },
    "note": {
      "typesetting": "TeX",
      "pages": 45,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012NatCo...3E1192X"
    }
  }
}