{
  "id": "1412.8359",
  "version": "v2",
  "published": "2014-12-29T14:59:11.000Z",
  "updated": "2015-04-13T05:18:44.000Z",
  "title": "Charge and spin transport in edge channels of a $ν=0$ quantum Hall system on the surface of topological insulators",
  "authors": [
    "Takahiro Morimoto",
    "Akira Furusaki",
    "Naoto Nagaosa"
  ],
  "comment": "7 pages, 5 figures",
  "journal": "Phys. Rev. Lett. 114, 146803 (2015)",
  "doi": "10.1103/PhysRevLett.114.146803",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Three-dimensional topological insulators of finite thickness can show the quantum Hall effect (QHE) at the filling factor $\\nu=0$ under an external magnetic field if there is a finite potential difference between the top and bottom surfaces. We calculate energy spectra of surface Weyl fermions in the $\\nu=0$ QHE and find that gapped edge states with helical spin structure are formed from Weyl fermions on the side surfaces under certain conditions. These edge channels account for the nonlocal charge transport in the $\\nu=0$ QHE which is observed in a recent experiment on (Bi$_{1-x}$Sb$_x$)$_2$Te$_3$ films. The edge channels also support spin transport due to the spin-momentum locking. We propose an experimental setup to observe various spintronics functions such as spin transport and spin conversion.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-12-29T14:59:11.000Z",
      "abstract": "Three-dimensional topological insulators of finite thickness can show the quantum Hall effect (QHE) at the filling factor $\\nu=0$ under an external magnetic field if there is a finite potential difference between the top and bottom surfaces. We calculate energy spectra of surface Weyl fermions in the $\\nu=0$ QHE and find that gapped edge states with helical spin structure are formed from Weyl fermions on the side surfaces under certain conditions. We study charge and spin transport through the edge channels and propose an experimental setup to observe (nonlocal) charge/spin response and spin conversion due to Zener tunneling in the helical edge states.",
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2015-04-13T05:18:44.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.20.-r",
      "71.10.Pm",
      "72.10.-d",
      "73.43.Cd"
    ],
    "keywords": [
      "quantum hall system",
      "edge channels",
      "spin transport",
      "topological insulators",
      "edge states"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2015,
      "month": "Apr",
      "volume": 114,
      "number": 14,
      "pages": 146803
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015PhRvL.114n6803M"
    }
  }
}