{
  "id": "cond-mat/9811245",
  "version": "v1",
  "published": "1998-11-17T10:23:01.000Z",
  "updated": "1998-11-17T10:23:01.000Z",
  "title": "Bose-Einstein statistics in thermalization and photoluminescence of quantum well excitons",
  "authors": [
    "A. L. Ivanov",
    "P. B. Littlewood",
    "H. Haug"
  ],
  "comment": "19 pages, 9 figures. Phys. Rev. B (accepted for publication)",
  "doi": "10.1103/PhysRevB.59.5032",
  "categories": [
    "cond-mat.stat-mech",
    "cond-mat.mes-hall"
  ],
  "abstract": "Quasi-equilibrium relaxational thermodynamics is developed to understand LA-phonon-assisted thermalization of Bose-Einstein distributed excitons in quantum wells. We study the quantum-statistical effects in the relaxational dynamics of the effective temperature of excitons $T = T(t)$. When $T$ is less than the degeneracy temperature $T_0$, well-developed Bose-Einstein statistics of quantum well excitons leads to nonexponential and density-dependent thermalization. At low bath temperatures $T_b \\to 0$ the thermalization of quantum-statistically degenerate excitons effectively slows down and $T(t) \\propto 1 / \\ln t$. We also analyze the optical decay of Bose-Einstein distributed excitons in perfect quantum wells and show how nonclassical statistics influences the effective lifetime $\\tau_{opt}$. In particular, $\\tau_{opt}$ of a strongly degenerate gas of excitons is given by $2 \\tau_R$, where $\\tau_R$ is the intrinsic radiative lifetime of quasi-two-dimensional excitons. Kinetics of resonant photoluminescence of quantum well excitons during their thermalization is studied within the thermodynamic approach and taking into account Bose-Einstein statistics. We find density-dependent photoluminescence dynamics of statistically degenerate excitons. Numerical modeling of the thermalization and photoluminescence kinetics of quasi-two-dimensional excitons are given for GaAs/AlGaAs quantum wells.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1998-11-17T10:23:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "thermalization",
      "bose-einstein distributed excitons",
      "quasi-two-dimensional excitons",
      "account bose-einstein statistics",
      "gaas/algaas quantum wells"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}