Imaging Nonequilibrium Atomic Vibrations with X-ray Diffuse Scattering
Journal Article
·
· Phys.Rev. B82:235205,2010
OSTI ID:1008336
We use picosecond x-ray diffuse scattering to image the nonequilibrium vibrations of the lattice following ultrafast laser excitation. We present images of nonequilibrium phonons in InP and InSb throughout the Brillouin-zone which remain out of equilibrium up to nanoseconds. The results are analyzed using a Born model that helps identify the phonon branches contributing to the observed features in the time-resolved diffuse scattering. In InP this analysis shows a delayed increase in the transverse acoustic (TA) phonon population along high-symmetry directions accompanied by a decrease in the longitudinal acoustic (LA) phonons. In InSb the increase in TA phonon population is less directional.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1008336
- Report Number(s):
- SLAC-PUB-14297; TRN: US1101626
- Journal Information:
- Phys.Rev. B82:235205,2010, Journal Name: Phys.Rev. B82:235205,2010
- Country of Publication:
- United States
- Language:
- English
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