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Time-resolved X-ray diffraction from coherent phonons during a laser-induced phase transition

Lindenberg, A. M; Kang, I; Johnson, S. L; Missalla, T; Heimann, P. A; Chang, Z; Larsson, Jörgen LU ; Bucksbaum, P. H; Kapteyn, H. C and Padmore, H. A, et al. (2000) In Physical Review Letters 84(1). p.111-114
Abstract
Time-resolved x-ray diffraction with picosecond temporal resolution is used to observe scattering from impulsively generated coherent acoustic phonons in laser-excited InSb crystals. The observed frequencies and damping rates are in agreement with a model based on dynamical diffraction theory coupled to analytic solutions for the laser-induced strain profile. The results are consistent with a 12 ps thermal electron-acoustic phonon coupling time together with an instantaneous component from the deformation-potential interaction. Above a critical laser fluence, we show that the first step in the transition to a disordered state is the excitation of large amplitude, coherent atomic motion.
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type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
84
issue
1
pages
111 - 114
publisher
American Physical Society
external identifiers
  • scopus:0000389765
ISSN
1079-7114
DOI
10.1103/PhysRevLett.84.111
language
English
LU publication?
yes
id
a5aa852b-e62e-4123-adc9-7ad095c364ef (old id 2258823)
date added to LUP
2012-02-18 10:40:12
date last changed
2017-08-13 04:34:38
@article{a5aa852b-e62e-4123-adc9-7ad095c364ef,
  abstract     = {Time-resolved x-ray diffraction with picosecond temporal resolution is used to observe scattering from impulsively generated coherent acoustic phonons in laser-excited InSb crystals. The observed frequencies and damping rates are in agreement with a model based on dynamical diffraction theory coupled to analytic solutions for the laser-induced strain profile. The results are consistent with a 12 ps thermal electron-acoustic phonon coupling time together with an instantaneous component from the deformation-potential interaction. Above a critical laser fluence, we show that the first step in the transition to a disordered state is the excitation of large amplitude, coherent atomic motion.},
  author       = {Lindenberg, A. M and Kang, I and Johnson, S. L and Missalla, T and Heimann, P. A and Chang, Z and Larsson, Jörgen and Bucksbaum, P. H and Kapteyn, H. C and Padmore, H. A and Lee, R. W and Wark, J. S and Falcone, R. W},
  issn         = {1079-7114},
  language     = {eng},
  number       = {1},
  pages        = {111--114},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Time-resolved X-ray diffraction from coherent phonons during a laser-induced phase transition},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.84.111},
  volume       = {84},
  year         = {2000},
}