{
  "id": "1410.7319",
  "version": "v1",
  "published": "2014-10-27T17:14:52.000Z",
  "updated": "2014-10-27T17:14:52.000Z",
  "title": "Tunable Giant Spin Hall Conductivities in a Strong Spin-Orbit Semimetal: Bi$_{1-x}$Sb$_x$",
  "authors": [
    "Cüneyt Şahin",
    "Michael E. Flatté"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Intrinsic spin Hall conductivities are calculated for strong spin-orbit Bi$_{1-x}$Sb$_x$ semimetals, from the Kubo formula and using Berry curvatures evaluated throughout the Brillouin zone from a tight-binding Hamiltonian. Nearly-crossing bands with strong spin-orbit interaction generate giant spin Hall conductivities in these materials, ranging from 474 ($\\hbar$/e)($\\Omega$cm)$^{-1}$ for bismuth to 96 ($\\hbar$/e)($\\Omega$cm)$^{-1}$ for antimony; the value for bismuth is more than twice that of platinum. The large spin Hall conductivities persist for alloy compositions corresponding to a three-dimensional topological insulator state, such as Bi$_{0.83}$Sb$_{0.17}$. The spin Hall conductivity could be changed by a factor of five for doped Bi, or for Bi$_{0.83}$Sb$_{0.17}$, by changing the chemical potential by 0.5 eV, suggesting the potential for doping or voltage tuned spin Hall current.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-10-27T17:14:52.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "75.76.+j",
      "85.75.-d"
    ],
    "keywords": [
      "spin hall conductivity",
      "tunable giant spin hall conductivities",
      "strong spin-orbit semimetal",
      "spin-orbit interaction generate giant",
      "generate giant spin hall"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevLett.114.107201",
      "journal": "Physical Review Letters",
      "year": 2015,
      "month": "Mar",
      "volume": 114,
      "number": 10,
      "pages": 107201
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015PhRvL.114j7201S"
    }
  }
}