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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 orcid ; 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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organization
publishing date
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
2016-04-04 07:58:30
date last changed
2025-10-14 11:27:49
@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          = {{https://lup.lub.lu.se/search/files/5161188/2297404.pdf}},
  doi          = {{10.1103/PhysRevLett.84.111}},
  volume       = {{84}},
  year         = {{2000}},
}