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Title: Experimental metrology to obtain thermal phonon transmission coefficients at solid interfaces

Journal Article · · Physical Review B
ORCiD logo [1];  [2];  [3];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). BioEnergy Science Center (BESC)
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  3. Boston College, Chestnut Hill, MA (United States)

Interfaces play an essential role in phonon-mediated heat conduction in solids, impacting applications ranging from thermoelectric waste heat recovery to heat dissipation in electronics. From the microscopic perspective, interfacial phonon transport is described by transmission coefficients that link vibrational modes in the materials composing the interface. But, direct experimental determination of these coefficients is challenging because most experiments provide a mode-averaged interface conductance that obscures the microscopic detail. Here, we report a metrology to extract thermal phonon transmission coefficients at solid interfaces using ab initio phonon transport modeling and a thermal characterization technique, time-domain thermoreflectance. In combination with transmission electron microscopy characterization of the interface, our approach allows us to link the atomic structure of an interface to the spectral content of the heat crossing it. This work provides a useful perspective on the microscopic processes governing interfacial heat conduction.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725; CBET 1254213
OSTI ID:
1407989
Journal Information:
Physical Review B, Vol. 95, Issue 20; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 59 works
Citation information provided by
Web of Science

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Cited By (9)

A Review of Experimental and Computational Advances in Thermal Boundary Conductance and Nanoscale Thermal Transport across Solid Interfaces journal August 2019
Full-field thermal imaging of quasiballistic crosstalk reduction in nanoscale devices journal January 2018
Interface-based two-way tuning of the in-plane thermal transport in nanofilms journal March 2018
High-frequency measurements of thermophysical properties of thin films using a modified broad-band frequency domain thermoreflectance approach journal August 2018
Tutorial: Time-domain thermoreflectance (TDTR) for thermal property characterization of bulk and thin film materials journal October 2018
Effects of metal silicide inclusion interface and shape on thermal transport in silicon nanocomposites journal July 2019
Perspective on ab initio phonon thermal transport journal August 2019
Modeling ballistic phonon transport from a cylindrical electron beam heat source journal September 2019
Interfacial Phonon Transport Through Si/Ge Multilayer Film Using Monte Carlo Scheme With Spectral Transmissivity journal May 2018

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