{
  "id": "0805.4602",
  "version": "v1",
  "published": "2008-05-29T18:23:45.000Z",
  "updated": "2008-05-29T18:23:45.000Z",
  "title": "Excitons in the wurtzite AlGaN/GaN quantum-well heterostructures",
  "authors": [
    "E. P. Pokatilov",
    "D. L. Nika",
    "V. M. Fomin",
    "J. T. Devreese",
    "Photonics",
    "Semiconductor Nanostructures",
    "TU Eindhoven",
    "The Netherlands)"
  ],
  "comment": "32 pages, 9 figures",
  "journal": "Phys. Rev. B 77, 125328 (2008) (10 pages)",
  "doi": "10.1103/PhysRevB.77.125328",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We have theoretically studied exciton states and photoluminescence spectra of strained wurtzite AlGaN/GaN quantum-well heterostructures. The electron and hole energy spectra are obtained by numerically solving the Schr\\\"odinger equation, both for a single-band Hamiltonian and for a non-symmetrical 6-band Hamiltonian. The deformation potential and spin-orbit interaction are taken into account. For increasing built-in field, generated by the piezoelectric polarization and by the spontaneous polarization, the energy of size quantization rises and the number of size quantized electron and hole levels in a quantum well decreases. The exciton energy spectrum is obtained using electron and hole wave functions and two-dimensional Coulomb wave functions as a basis. We have calculated the exciton oscillator strengths and identified the exciton states active in optical absorption. For different values of the Al content x, a quantitative interpretation, in a good agreement with experiment, is provided for (i) the red shift of the zero-phonon photoluminescence peaks for increasing the quantum-well width, (ii) the relative intensities of the zero-phonon and one-phonon photoluminescence peaks, found within the non-adiabatic approach, and (iii) the values of the photoluminescence decay time as a function of the quantum-well width.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2008-05-29T18:23:45.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.21.Fg",
      "73.43.Cd",
      "78.67.De",
      "78.55.Cr"
    ],
    "keywords": [
      "exciton states",
      "quantum-well width",
      "strained wurtzite algan/gan quantum-well heterostructures",
      "two-dimensional coulomb wave functions",
      "energy spectrum"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2008,
      "month": "Mar",
      "volume": 77,
      "number": 12,
      "pages": 125328
    },
    "note": {
      "typesetting": "TeX",
      "pages": 32,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvB..77l5328P"
    }
  }
}