{
  "id": "1602.08243",
  "version": "v1",
  "published": "2016-02-26T08:57:17.000Z",
  "updated": "2016-02-26T08:57:17.000Z",
  "title": "Weak topological insulators with step edges: Subband engineering and its effect on electron transport",
  "authors": [
    "Takashi Arita",
    "Yositake Takane"
  ],
  "comment": "5 pages, 13 figures",
  "journal": "J. Phys. Soc. Jpn. 85, 033706 (2016)",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "A three-dimensional weak topological insulator (WTI) can be regarded as stacked layers of two-dimensional quantum spin-Hall insulators, each of which accommodates a one-dimensional helical edge mode. Massless Dirac electrons emerge on a side surface of WTIs as a consequence of the hybridization of such helical edge modes. We study the energy spectrum and transport of Dirac electrons on a side surface in the presence of step edges, which significantly modify the way of hybridization. It is shown that pseudo-helical modes with a nearly gapless linear dispersion can be created by manipulating step edges in a certain manner. We numerically calculate the average conductance of weakly disordered WTIs and show that it is markedly enhanced by pseudo-helical modes.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-02-26T08:57:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "step edges",
      "electron transport",
      "subband engineering",
      "two-dimensional quantum spin-hall insulators",
      "side surface"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.7566/JPSJ.85.033706",
      "journal": "Journal of the Physical Society of Japan",
      "year": 2016,
      "month": "Mar",
      "volume": 85,
      "number": 3,
      "pages": "033706"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2016JPSJ...85c3706A"
    }
  }
}