{
  "id": "1112.5596",
  "version": "v1",
  "published": "2011-12-23T14:42:11.000Z",
  "updated": "2011-12-23T14:42:11.000Z",
  "title": "Signatures of spin blockade in the optical response of a charged quantum dot",
  "authors": [
    "E. G. Kavousanaki",
    "Guido Burkard"
  ],
  "comment": "8 pages, 8 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We model spin blockade for optically excited electrons and holes in a charged semiconductor quantum dot. We study the case where the quantum dot is initially charged with a single electron and is then filled with an additional, optically excited electron-hole pair, thus forming a charged exciton (trion). To make contact with recent experiments, we model an optical pump-probe setup, in which the two lowest quantum dot levels (s and p shells) are photo excited. Using the Lindblad master equation, we calculate the differential transmission spectrum as a function of the pump-probe time delay. Taking into account both spin conserving and spin-flip intraband relaxation processes, we find that the presence of the ground-state electron spin leads to an optical spin blockade at short delay times which is visible as a crossover between two exponential decays of the differential transmission. To make predictions for future experiments, we also study the dependence of the spin-blockade on an external magnetic field.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-12-23T14:42:11.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "78.47.J-",
      "73.21.La",
      "78.67.Hc",
      "72.25.Fe"
    ],
    "keywords": [
      "spin blockade",
      "charged quantum dot",
      "optical response",
      "spin-flip intraband relaxation processes",
      "signatures"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.86.045122",
      "journal": "Physical Review B",
      "year": 2012,
      "month": "Jul",
      "volume": 86,
      "number": 4,
      "pages": "045122"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvB..86d5122K"
    }
  }
}