Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 129, Issue -, Pages 312-316Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2019.01.030
Keywords
Bismuth; Coherent acoustic phonon; Electronic Gruneisen parameter; Femtosecond laser heating; Hot electron blast
Funding
- National Science Foundation [1708717]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1708717] Funding Source: National Science Foundation
Ask authors/readers for more resources
In this study, we probed the lattice dynamics of bismuth subjected to femtosecond laser irradiation by ultrafast electron diffraction. The changes in the diffraction intensity and angle were determined. The lattice exhibited compression upon laser excitation, followed by expansion with damped vibrations. Coherent acoustic phonons were observed as oscillations in the lattice spacing. The results were analyzed using a damped harmonic oscillator model where the hot electrons caused the blast compressive force, which resulted in lattice-spacing oscillation for the expanded lattice following the compression. We obtained the rate of electron-phonon coupling, its anisotropy, and the Gruneisen parameters of the electronic subsystem.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available