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- W2979357289 abstract "Point defects exist widely in engineering materials and are known to scatter vibrational modes to reduce thermal conductivity. The Klemens description of point defect scattering is the most prolific analytical model for this effect. This work reviews the essential physics of the model and compares its predictions to first principles results for isotope and alloy scattering, demonstrating the model as a useful materials design metric. A treatment of the scattering parameter ($Gamma$) for a multiatomic lattice is recommended and compared to other treatments presented in literature, which have been at times misused to yield incomplete conclusions about the system's scattering mechanisms. Additionally, we demonstrate a reduced sensitivity of the model to the full phonon dispersion and discuss its origin. Finally, a simplified treatment of scattering in alloy systems with vacancies and interstitial defects is demonstrated to suitably describe the potent scattering strength of these off-stoichiometric defects." @default.
- W2979357289 created "2019-10-18" @default.
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- W2979357289 date "2020-03-04" @default.
- W2979357289 modified "2023-10-18" @default.
- W2979357289 title "Analytical Models of Phonon–Point-Defect Scattering" @default.
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- W2979357289 doi "https://doi.org/10.1103/physrevapplied.13.034011" @default.
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