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- W4366999732 abstract "Callaway's simplified heat flow model is often used to confirm experimental realizations of unconventional, hydrodynamic and Poiseuille phonon transport in ultrahigh thermal conductivity ($kappa$) materials, due to its simplicity and low computational cost. Here, we show that the Callaway model works exceptionally well for most ultrahigh-$kappa$ materials like diamond and boron nitride, but fails dramatically for boron arsenide (BAs) and boron antimonide (BSb). This failure is driven by the inability of the Callaway model to effectively describe the severely restricted phonon scattering in BAs and BSb, where many scattering selection rules are activated simultaneously. Our work highlights the powerful predictive capability of the Callaway model, and gives insights into the nature of phonon scattering in ultrahigh-$kappa$ materials and the suitability of the Callaway's description of heat flow through them." @default.
- W4366999732 created "2023-04-27" @default.
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- W4366999732 date "2023-04-23" @default.
- W4366999732 modified "2023-10-12" @default.
- W4366999732 title "Dramatic Failure of the Callaway Description of Heat Flow in Boron Arsenide and Boron Antimonide Driven by Phonon Scattering Selection Rules" @default.
- W4366999732 doi "https://doi.org/10.1103/physrevb.108.155201" @default.
- W4366999732 hasPublicationYear "2023" @default.
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