X-ray absorption spectra of In x Ga1-x N alloys with insight from atom-specific simulations (Articolo in rivista)

Type
Label
  • X-ray absorption spectra of In x Ga1-x N alloys with insight from atom-specific simulations (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.86.155211 (literal)
Alternative label
  • L. Amidani, F. Filippone, A. Amore Bonapasta, G. Ciatto, V. Lebedev, A. Knubel, F. Boscherini (2012)
    X-ray absorption spectra of In x Ga1-x N alloys with insight from atom-specific simulations
    in Physical review. B, Condensed matter and materials physics (Online); The American Physical Society, College Park, MD 20740-3844 (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • L. Amidani, F. Filippone, A. Amore Bonapasta, G. Ciatto, V. Lebedev, A. Knubel, F. Boscherini (literal)
Pagina inizio
  • 155211 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 86 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 15 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Department of Physics, University of Bologna, viale C. Berti Pichat 6/2, 40127 Bologna, Italy CNISM, Department of Physics, University of Bologna, viale C. Berti Pichat 6/2, 40127 Bologna, Italy CNR-Istituto di Struttura della Materia (ISM), Via Salaria Km 29.5, CP 10, I-00016 Monterotondo Stazione, Italy Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif sur Yvette Cedex, France Fraunhofer Institute for Applied Solid State Physics, Tullastr. 72, 79108 Freiburg, Germany CNR-Istituto Officina dei Materiali, Area Science Park, S.S. 14, Km. 163.5, 34012 Trieste, Italy (literal)
Titolo
  • X-ray absorption spectra of In x Ga1-x N alloys with insight from atom-specific simulations (literal)
Abstract
  • We report N-K-edge x-ray absorption near-edge spectra of a set of InxGa1-xN alloy epilayers with 0.36<=x<=0.87, including linear dichroism effects. Careful experimental and data treatment procedures lead to consistent variations of spectral features with In concentration and sample orientation with respect to the direction of linear polarization of the x-ray beam. Insight into the origin of spectral features is provided by a combination of ab initio simulations of the equilibrium structure and atom-by-atom spectral simulations. The relation between the spectral lineshape and the variations in the composition of the first coordination shell and the corresponding local structural distortions is discussed. (literal)
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