Effects of localized phonons on interfacial thermal conductance

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Effects of localized phonons on interfacial thermal conductance
Title:
Effects of localized phonons on interfacial thermal conductance
Journal Title:
Physical Review B
Keywords:
Publication Date:
30 November 2022
Citation:
Zhou, H., Zhang, G., & Zhang, Y.-W. (2022). Effects of localized phonons on interfacial thermal conductance. Physical Review B, 106(19). https://doi.org/10.1103/physrevb.106.195435
Abstract:
Interfacial thermal conduction is traditionally described by the transmission of travelling phonons in their bulk counterparts. However, recent experiments suggest that localized phonons at an interface may exert a substantial influence on interfacial thermal conductance. By considering quantum phonon scattering processes at a weakly interacting interface, we analyze the role of localized phonons at the interface involved in the interfacial thermal conduction and discover that there is a coupling between travelling phonons and the even orders of the localized phonons at the interface. Using the fourth-order localized phonons as an example, we show that the travelling phonons can collide with the localized phonons at the interface. Such collisions can significantly change the transmission probability of the travelling phonons and thus affect the interfacial thermal conductance, and importantly, such effects become increasingly significant with increasing temperature.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the A*STAR - SERC Central Research Fund Award
Grant Reference no. : N.A

This research / project is supported by the National Research Foundation - Competitive Research Program
Grant Reference no. : NRF-CRP24-2020-0002
Description:
ISSN:
2469-9969
2469-9950
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