{
  "id": "1111.1447",
  "version": "v2",
  "published": "2011-11-06T20:08:13.000Z",
  "updated": "2012-01-22T21:56:04.000Z",
  "title": "Flat bands with non-trivial topology in three dimensions",
  "authors": [
    "C. Weeks",
    "M. Franz"
  ],
  "comment": "5 pages, 3 figures; references updated, minor changes to improve clarity of text, version to appear in PRB/RC",
  "journal": "Phys. Rev. B 85, 041104(R) (2012)",
  "doi": "10.1103/PhysRevB.85.041104",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We construct a simple model for electrons in a three-dimensional crystal where a combination of short-range hopping and spin-orbit coupling results in nearly flat bands characterized by a non-trivial Z2 topological index. The flat band is separated from other bands by a bandgap much larger than the bandwidth. We discuss the fate of the many-body ground state of electrons in the flat band in the presence of repulsive interactions at partial filling and conjecture that it may become a three-dimensional fractional topological insulator if conventional magnetic instabilities can be avoided.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2012-01-22T21:56:04.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "71.10.Fd",
      "73.43.Cd"
    ],
    "keywords": [
      "flat band",
      "non-trivial topology",
      "dimensions",
      "non-trivial z2 topological index",
      "many-body ground state"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2012,
      "month": "Jan",
      "volume": 85,
      "number": 4,
      "pages": "041104"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvB..85d1104W"
    }
  }
}