{
  "id": "cond-mat/0607728",
  "version": "v3",
  "published": "2006-07-27T15:29:52.000Z",
  "updated": "2006-10-13T13:06:26.000Z",
  "title": "Bistability of the Nuclear Polarisation created through optical pumping in InGaAs Quantum Dots",
  "authors": [
    "P. -F. Braun",
    "B. Urbaszek",
    "T. Amand",
    "X. Marie",
    "O. Krebs",
    "B. Eble",
    "A. Lemaitre",
    "P. Voisin"
  ],
  "comment": "Phys Rev B (in press)",
  "journal": "PHYSICAL REVIEW B 74, 245306 (2006)",
  "doi": "10.1103/PhysRevB.74.245306",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We show that optical pumping of electron spins in individual InGaAs quantum dots leads to strong nuclear polarisation that we measure via the Overhauser shift (OHS) in magneto-photoluminescence experiments between 0 and 4T. We find a strongly non-monotonous dependence of the OHS on the applied magnetic field, with a maximum nuclear polarisation of 40% for intermediate magnetic fields. We observe that the OHS is larger for nuclear fields anti-parallel to the external field than in the parallel configuration. A bistability in the dependence of the OHS on the spin polarization of the optically injected electrons is found. All our findings are qualitatively understood with a model based on a simple perturbative approach.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2006-10-13T13:06:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "optical pumping",
      "bistability",
      "individual ingaas quantum dots",
      "strong nuclear polarisation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}