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Title: Determination of transient atomic structure of laser-excited materials from time-resolved diffraction data

The time evolution of the Bragg peaks of photo-excited gold nanofilms is measured using transmission ultrafast electron diffraction (UED) with 3.0 MeV electron pulses and the corresponding structure evolution is calculated using two-temperature molecular dynamics (2T-MD). The good agreement obtained between the measured and calculated Bragg peaks, over the full experimental timescale, enables the lattice temperature effects and the structural changes to be disentangled for the first time. The agreement demonstrates that 2T-MD is a reliable method for solving the inverse problem of structure determination of laser irradiated metals in UED measurements.
Authors:
 [1] ;  [2] ; ; ; ;  [1] ; ; ;  [3]
  1. The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047 (Japan)
  2. (United Kingdom)
  3. Department of Physics and Astronomy, University College London, Gower Street, WC1E 6BT London (United Kingdom)
Publication Date:
OSTI Identifier:
22217765
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 25; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; BEAMS; BRAGG CURVE; ELECTRON DIFFRACTION; EVOLUTION; GOLD; IRRADIATION; LASER MATERIALS; MEV RANGE 01-10; MOLECULAR DYNAMICS METHOD; NANOSTRUCTURES; PROCESSING; PULSES; SPECTRA; TEMPERATURE DEPENDENCE; THIN FILMS; TIME RESOLUTION; TRANSIENTS