Malviya, N and Ravichandran, NK (2023) Failure of the Callaway description of heat flow in boron arsenide and boron antimonide driven by phonon scattering selection rules. In: Physical Review B, 108 (15).
|
PDF
Phy_rev_108_15_2023.pdf - Published Version Download (5MB) | Preview |
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 (κ) materials, due to its simplicity and low computational cost. Here, we show that the Callaway model works exceptionally well for most ultrahigh-κ 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-κ materials and the suitability of Callaway's description of heat flow through them. © 2023 American Physical Society.
| Item Type: | Journal Article |
|---|---|
| Publication: | Physical Review B |
| Publisher: | American Physical Society |
| Additional Information: | The copyright for this article belongs to author. |
| Keywords: | Heat transfer; III-V semiconductors; Phonons; Thermal conductivity, Antimonides; Callaway; Callaway model; Computational costs; Experimental realizations; Heat-flow; Heat-flow models; Phonon transport; Selection Rules; Ultrahigh-thermal-conductivity, Phonon scattering |
| Department/Centre: | Division of Mechanical Sciences > Mechanical Engineering |
| Date Deposited: | 01 Mar 2024 05:19 |
| Last Modified: | 01 Mar 2024 05:19 |
| URI: | https://eprints.iisc.ac.in/id/eprint/83756 |
Actions (login required)
 |
View Item |
