Tang, X; Li, Chen W; Fultz, B Anharmonicity-induced phonon broadening in aluminum at high temperatures Journal Article Physical Review B, 82 (18), pp. 184301, 2010. Abstract | Links | BibTeX | Tags: Al, anharmonicity, high temperature, lifetime, phonon @article{tang_anharmonicity-induced_2010, title = {Anharmonicity-induced phonon broadening in aluminum at high temperatures}, author = {X Tang and Chen W Li and B Fultz}, url = {https://link.aps.org/doi/10.1103/PhysRevB.82.184301}, doi = {10.1103/PhysRevB.82.184301}, year = {2010}, date = {2010-11-01}, journal = {Physical Review B}, volume = {82}, number = {18}, pages = {184301}, 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.}, keywords = {Al, anharmonicity, high temperature, lifetime, phonon}, pubstate = {published}, tppubtype = {article} } 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. |
Anharmonicity-induced phonon broadening in aluminum at high temperatures Journal Article Physical Review B, 82 (18), pp. 184301, 2010. |