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Title: Anisotropic In distribution in InGaN core-shell nanowires

In this work, we investigate the local atomic structure of defect-free homogeneous and self-organized core-shell structure nanowires by means of X-ray Absorption Fine Structure (XAFS) Spectroscopy at the In L{sub III} and K edges and Multiwavelength Anomalous Diffraction. The results are interpreted by comparison of the experimental data with X-ray absorption calculations carried out with ab initio structural models. Extended-XAFS data analysis at In K-edge shows an anisotropic In distribution in the second nearest neighbors pointing out to a deviation from randomness in In distribution for the core-shell sample.
Authors:
;  [1] ;  [2] ; ;  [3] ;  [4]
  1. Laboratoire des Matériaux et du Génie Physique, Grenoble INP - Minatec, Grenoble (France)
  2. Liten, CEA-Grenoble, 17 rue des martyrs, 38054 Grenoble (France)
  3. CEA-CNRS group Nanophysique et Semiconducteurs, Université Joseph Fourier and CEA Grenoble, INAC, SP2M, 17 rue des Martyrs, 38054 Grenoble (France)
  4. Departamento de Fisica de la Materia Condensada, Instituto de Ciencia de Materiales de Aragon, CSIC - Universidad de Zaragoza, Zaragoza (Spain)
Publication Date:
OSTI Identifier:
22306168
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION; ABSORPTION SPECTROSCOPY; ANISOTROPY; DATA ANALYSIS; DEFECTS; DIFFRACTION; DISTRIBUTION; FINE STRUCTURE; GALLIUM COMPOUNDS; INDIUM COMPOUNDS; NANOWIRES; NITROGEN COMPOUNDS; QUANTUM WIRES; RANDOMNESS; STRUCTURAL MODELS; X RADIATION; X-RAY SPECTROSCOPY