Evaluation of the diffuse mismatch model for phonon scattering at disordered interfaces
Name
PhysRevB.104.085310.pdf
Description
Published version
Size
2.69 MB
Format
Adobe PDF
Checksum (MD5)
995bb0d852d487b186154d6c617a05ef
Author(s)
Song, Qichen
Chen, Gang
Date Issued
August 30, 2021
Journal
Physical Review B
Publisher
American Physical Society (APS)
Citation
Song, Qichen and Chen, Gang. 2021. "Evaluation of the diffuse mismatch model for phonon scattering at disordered interfaces." Physical Review B, 104 (8).
Version
Final published version
Abstract
Diffuse phonon scattering strongly affects the phonon transport through a disordered interface. The often-used
diffuse mismatch model assumes that phonons lose memory of their origin after being scattered by the interface.
Using mode-resolved atomistic Green’s function simulation, we demonstrate that diffuse phonon scattering by
a single disordered interface cannot make a phonon lose its memory and thus the applicability of the diffusive
mismatch model is limited. An analytical expression for diffuse scattering probability based on the continuum
approximation is also derived and shown to work reasonably well at low frequencies
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1103/physrevb.104.085310
