{
  "id": "0907.5051",
  "version": "v1",
  "published": "2009-07-29T05:48:43.000Z",
  "updated": "2009-07-29T05:48:43.000Z",
  "title": "Weak (anti-)localization in doped Z_2-topological insulator",
  "authors": [
    "Ken-Ichiro Imura",
    "Yoshio Kuramoto",
    "Kentaro Nomura"
  ],
  "comment": "16 pages, 5 figures",
  "journal": "Phys. Rev. B 80, 085119 (2009).",
  "doi": "10.1103/PhysRevB.80.085119",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Localization properties of the doped Z_2-topological insulator are studied by weak localization theory. The disordered Kane-Mele model for graphene is taken as a prototype, and analyzed with attention to effects of the topological mass term, inter-valley scattering, and the Rashba spin-orbit interaction. The known tendency of graphene to anti-localize in the absence of inter-valley scattering between K and K' points is naturally placed as the massless limit of Kane-Mele model. The latter is shown to have a unitary behavior even in the absence of magnetic field due to the topological mass term. When inter-valley scattering is introduced, the topological mass term leaves the system in the unitary class, whereas the ordinary mass term, which appears if A and B sublattices are inequivalent, turns the system to weak localization. The Rashba spin-orbit interaction in the presence of K-K' scattering drive the system to weak anti-localization in sharp contrast to the ideal graphene case.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-07-29T05:48:43.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "72.10.-d",
      "72.15.Rn",
      "73.20.Fz"
    ],
    "keywords": [
      "rashba spin-orbit interaction",
      "inter-valley scattering",
      "ordinary mass term",
      "ideal graphene case",
      "weak localization theory"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2009,
      "month": "Aug",
      "volume": 80,
      "number": 8,
      "pages": "085119"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvB..80h5119I"
    }
  }
}