{
  "id": "1012.1083",
  "version": "v1",
  "published": "2010-12-06T06:12:51.000Z",
  "updated": "2010-12-06T06:12:51.000Z",
  "title": "Spin Polarization and Transport of Surface States in the Topological Insulators Bi2Se3 and Bi2Te3 from First Principles",
  "authors": [
    "Oleg V. Yazyev",
    "Joel E. Moore",
    "Steven G. Louie"
  ],
  "comment": "4+ pages, 3 figures",
  "journal": "Phys. Rev. Lett. 105, 266806 (2010)",
  "doi": "10.1103/PhysRevLett.105.266806",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We investigate the band dispersion and the spin texture of topologically protected surface states in the bulk topological insulators Bi2Se3 and Bi2Te3 by first-principles methods. Strong spin-orbit entanglement in these materials reduces the spin-polarization of the surface states to ~50% in both cases; this reduction is absent in simple models but of important implications to essentially any spintronic application. We propose a way of controlling the magnitude of spin polarization associated with a charge current in thin films of topological insulators by means of an external electric field. The proposed dual-gate device configuration provides new possibilities for electrical control of spin.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-12-06T06:12:51.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.20.-r",
      "72.25.-b",
      "75.70.Tj"
    ],
    "keywords": [
      "spin polarization",
      "first principles",
      "dual-gate device configuration",
      "external electric field",
      "bulk topological insulators bi2se3"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2010,
      "month": "Dec",
      "volume": 105,
      "number": 26,
      "pages": 266806
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhRvL.105z6806Y"
    }
  }
}