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Picosecond dynamics of laser-induced strain in graphite

På svenska

Author

  • Maher Harb
  • Andrius Jurgilaitis
  • Henrik Enquist
  • Ralf Nüske
  • C. v. Korff Schmising
  • J. Gaudin
  • S. L. Johnson
  • C. J. Milne
  • P. Beaud
  • E. Vorobeva
  • A. Caviezel
  • S. O. Mariager
  • G. Ingold
  • Jörgen Larsson
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Summary, in English

We report on the use of grazing-incidence time-resolved x-ray diffraction to investigate the evolution of strain in natural graphite excited by femtosecond-laser pulses in the fluence range of 6-35 mJ/cm(2). Strains corresponding to up to similar to 2.8% c-axis expansion were observed. We show that the experimental data is in good agreement with calculations based on the Thomsen strain model in conjunction with dynamical diffraction theory. Furthermore we find no evidence of nonthermal lattice expansion as reported in recent ultrafast electron-diffraction studies of laser-excited graphite conducted under comparable excitation conditions.

Publishing year

2011

Language

English

Publication/Series

Physical Review B (Condensed Matter and Materials Physics)

Volume

84

Issue

4

Document type

Journal article

Publisher

American Physical Society

Topic

  • Physical Sciences
  • Atom and Molecular Physics and Optics
  • Natural Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 1098-0121