Anharmonicity-induced phonon broadening in aluminum at high temperatures
- Creators
- Tang, Xiaoli
- Li, Chen W.
- Fultz, B.
Abstract
Thermal phonon broadening in aluminum was studied by theoretical and experimental methods. Using second-order perturbation theory, phonon linewidths from the third-order anharmonicity were calculated from first-principles density-functional theory (DFT) with the supercell finite-displacement method. The importance of all three-phonon processes were assessed and individual phonon broadenings are presented. The good agreement between calculations and prior measurements of phonon linewidths at 300 K and new measurements of the phonon density of states to 750 K indicates that the third-order phonon-phonon interactions calculated from DFT can account for the lifetime broadenings of phonons in aluminum to at least 80% of its melting temperature.
Additional Information
© 2010 American Physical Society. Received 19 October 2010; published 3 November 2010. This work was supported by DOE BES under Contract No. DE-FG02-03ER46055. The work benefited from software developed in the DANSE project under NSF under © 2010 Award No. DMR-0520547. The research at Oak Ridge National Laboratory's Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, DOE.Attached Files
Published - Tang2010p11994Phys_Rev_B.pdf
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Additional details
- Eprint ID
- 21195
- Resolver ID
- CaltechAUTHORS:20101206-143055391
- DE-FG02-03ER46055
- Department of Energy (DOE)
- DMR-0520547
- NSF
- Created
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2010-12-07Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field