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Time- and momentum-resolved probe of heat transport in photo-excited bismuth
Chen, J.; Trigo, M.; Fahy, Stephen B.; Murray, Éamonn D.; Sheu, Y. M.; Graber, T.; Henning, R.; Chien, Y. J.; Uher, C.; Reis, D. A.
We use time- and momentum-resolved x-ray scattering to study thermalization in a photo-excited thin single crystal bismuth film on sapphire. The time-resolved changes of the diffuse scattering show primarily a quasi-thermal phonon distribution that is established in less than or similar to 100 ps and that follows the time-scale of thermal transport. Ultrafast melting measurements under high laser excitation show that epitaxial regrowth of the liquid phase occurs on the time-scale of thermal transport across the bismuth-sapphire interface. (C) 2013 AIP Publishing LLC. (DOI: 10.1063/1.4804291)
Keyword(s): Functional perturbation-theory; Phonons; X-ray scattering; Bismuth; Compton scattering; Time resolved imaging
Publication Date:
2013
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Funder(s): Science Foundation Ireland
Citation(s): Chen, J., Trigo, M., Fahy, S., Murray, É. D., Sheu, Y. M., Graber, T., Henning, R., Chien, Y. J., Uher, C. and Reis, D. A. (2013) 'Time- and momentum-resolved probe of heat transport in photo-excited bismuth', Applied Physics Letters, 102(18), pp. 181903. doi: 10.1063/1.4804291
Publisher(s): AIP Publishing
File Format(s): application/pdf
Related Link(s): http://dx.doi.org/10.1063/1.4804291
First Indexed: 2017-09-06 06:39:14 Last Updated: 2017-09-06 06:39:14