{
  "id": "1207.7259",
  "version": "v1",
  "published": "2012-07-31T14:35:23.000Z",
  "updated": "2012-07-31T14:35:23.000Z",
  "title": "Backscattering Between Helical Edge States via Dynamic Nuclear Polarization",
  "authors": [
    "Adrian Del Maestro",
    "Timo Hyart",
    "Bernd Rosenow"
  ],
  "comment": "4+ pages, 4 figures",
  "journal": "Phys. Rev. B 87, 165440 (2013)",
  "doi": "10.1103/PhysRevB.87.165440",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We show that that the non-equilibrium spin polarization of one dimensional helical edge states at the boundary of a two dimensional topological insulator can dynamically induce a polarization of nuclei via the hyperfine interaction. When combined with a spatially inhomogeneous Rashba coupling, the steady state polarization of the nuclei produces backscattering between the topologically protected edge states leading to a reduction in the conductance which persists to zero temperature. We study these effects in both short and long edges, uncovering deviations from Ohmic transport at finite temperature and a current noise spectrum which may hold the fingerprints for experimental verification of the backscattering mechanism.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-07-31T14:35:23.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "72.15.Lh",
      "31.30.Gs",
      "72.25.-b",
      "85.75.-d"
    ],
    "keywords": [
      "dynamic nuclear polarization",
      "protected edge states leading",
      "backscattering",
      "current noise spectrum",
      "steady state polarization"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2013,
      "month": "Apr",
      "volume": 87,
      "number": 16,
      "pages": 165440
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvB..87p5440D"
    }
  }
}