{
  "id": "1212.3494",
  "version": "v1",
  "published": "2012-12-14T14:55:03.000Z",
  "updated": "2012-12-14T14:55:03.000Z",
  "title": "Ultrafast photodoping and effective Fermi-Dirac distribution of the Dirac particles in Bi2Se3",
  "authors": [
    "A. Crepaldi",
    "B. Ressel",
    "F. Cilento",
    "M. Zacchigna",
    "C. Grazioli",
    "H. Berger",
    "Ph. Bugnon",
    "K. Kern",
    "M. Grioni",
    "F. Parmigiani"
  ],
  "comment": "5 Pages, 3 Figures",
  "journal": "Phys. Rev. B 86, 205133 (2012)",
  "doi": "10.1103/PhysRevB.86.205133",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We exploit time- and angle- resolved photoemission spectroscopy to determine the evolution of the out-of-equilibrium electronic structure of the topological insulator Bi2Se. The response of the Fermi-Dirac distribution to ultrashort IR laser pulses has been studied by modelling the dynamics of the hot electrons after optical excitation. We disentangle a large increase of the effective temperature T* from a shift of the chemical potential mu*, which is consequence of the ultrafast photodoping of the conduction band. The relaxation dynamics of T* and mu* are k-independent and these two quantities uniquely define the evolution of the excited charge population. We observe that the energy dependence of the non-equilibrium charge population is solely determined by the analytical form of the effective Fermi-Dirac distribution.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-12-14T14:55:03.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "78.47.jd",
      "78.30.-j",
      "79.60.-i",
      "73.20.-r"
    ],
    "keywords": [
      "effective fermi-dirac distribution",
      "dirac particles",
      "ultrafast photodoping",
      "ultrashort ir laser pulses",
      "out-of-equilibrium electronic structure"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2012,
      "month": "Nov",
      "volume": 86,
      "number": 20,
      "pages": 205133
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvB..86t5133C"
    }
  }
}