TITLE

Contribution of optical phonons to thermal boundary conductance

AUTHOR(S)
Beechem, Thomas; Duda, John C.; Hopkins, Patrick E.; Norris, Pamela M.
PUB. DATE
August 2010
SOURCE
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p061907
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Thermal boundary conductance (TBC) is a performance determinant for many microsystems due to the numerous interfaces contained within their structure. To assess this transport, theoretical approaches often account for only the acoustic phonons as optical modes are assumed to contribute negligibly due to their low group velocities. To examine this approach, the diffuse mismatch model is reformulated to account for more realistic dispersions containing optical modes. Using this reformulation, it is found that optical phonons contribute to TBC by as much as 80% for a variety of material combinations in the limit of both inelastic and elastic scattering.
ACCESSION #
52929591

 

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