Time- and momentum-resolved probe of heat transport in photo-excited bismuth
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Date
2013
Authors
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.
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Volume Title
Publisher
AIP Publishing
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Abstract
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)
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Keywords
Functional perturbation-theory , Phonons , X-ray scattering , Phonons , Bismuth , Compton scattering , Time resolved imaging
Citation
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
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© 2013 AIP Publishing LLC..This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in 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 and may be found at http://dx.doi.org/10.1063/1.4804291