Local structure of nitrogen-hydrogen complexes in dilute nitrides (Articolo in rivista)

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  • Local structure of nitrogen-hydrogen complexes in dilute nitrides (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • G. Ciatto; F. Boscherini; A. Amore Bonapasta; F. Filippone; A. Polimeni; M. Capizzi; M. Berti; G. Bisognin; D. De Salvador; L. Floreano; F. Martelli; S. Rubini; and L. Grenouillet (2009)
    Local structure of nitrogen-hydrogen complexes in dilute nitrides
    in Physical review. B, Condensed matter and materials physics; The American Physical Society, College Park, MD 20740-3844 (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • G. Ciatto; F. Boscherini; A. Amore Bonapasta; F. Filippone; A. Polimeni; M. Capizzi; M. Berti; G. Bisognin; D. De Salvador; L. Floreano; F. Martelli; S. Rubini; and L. Grenouillet (literal)
Pagina inizio
  • 165205 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 79 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif sur Yvette Cedex, France; 2Department of Physics and CNISM, University of Bologna, V. le C. Berti Pichat 6/2, 40127 Bologna, Italy; 3CNR-Istituto di Struttura della Materia (ISM), Via Salaria Km 29.5, CP 10, I-00016 Monterotondo Stazione, Italy; 4CNISM-Dipartimento di Fisica, Sapienza Università di Roma, Piazzale A. Moro 2, 00185 Roma, Italy; 5MATIS CNR-INFM e Dipartimento di Fisica, Università di Padova, Via Marzolo 8, 35131 Padova, Italy; 6CNISM, Unità di Padova, Via Marzolo 8, 35131 Padova, Italy; 7TASC-INFM-CNR, Area Science Park, S.S. 14, Km. 163.5, 34012 Trieste, Italy; 8CEA-LETI, MINATEC, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France; (literal)
Titolo
  • Local structure of nitrogen-hydrogen complexes in dilute nitrides (literal)
Abstract
  • We have investigated the structure of nitrogen-hydrogen complexes in GaAs1-yNy and InxGa1-xAs1-yNy dilute nitride alloys by performing x-ray absorption near-edge structure spectroscopy ?XANES?. We simulated the spectra based on first-principles calculations of the most recent defective structures proposed in the literature for hydrogenated materials. The comparison between the experimental data and simulations allows us to clarify that the core of the defect is a complex with C2v structure in the neutral charge state, in agreement with the expansion of the lattice parameter measured by x-ray diffraction. Our results are compatible with the presence of H satellites bound to neighboring Ga atoms but not with complexes involving more than two H atoms bound to the same N. Nevertheless, we were not able to determine uniquely the number of H satellites, which may depend on growth conditions. Strain related to the epitaxial growth has a very little effect on the XANES spectra. (literal)
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