Reconstructing phonon mean-free-path contributions to thermal conductivity using nanoscale membranes

Cuffe, John; Eliason, Jeffrey K.; Maznev, A. A.; Collins, Kimberlee C.; Johnson, Jeremy A.; Shchepetov, Andrey; Prunnila, Mika; Ahopelto, Jouni; Sotomayor Torres, Clivia M.; Chen, Gang; Nelson, Keith A.

doi:10.1103/PhysRevB.91.245423

Title: Reconstructing phonon mean-free-path contributions to thermal conductivity using nanoscale membranes

Journal Article · Wed Jun 17 00:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.91.245423· OSTI ID:1370995

Cuffe, John ^[1]; Eliason, Jeffrey K. ^[1]; Maznev, A. A. ^[1]; Collins, Kimberlee C. ^[1]; Johnson, Jeremy A. ^[2]; Shchepetov, Andrey ^[3]; Prunnila, Mika ^[3]; Ahopelto, Jouni ^[3]; Sotomayor Torres, Clivia M. ^[4]; Chen, Gang ^[1]; Nelson, Keith A. ^[1]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Brigham Young Univ., Provo, UT (United States)
VTT Technical Research Centre of Finland Ltd., Espoo (Finland)
ICN2-Catalan Inst. of Nanoscience and Nanotechnology, Bellaterra (Spain); Catalan Inst. for Research and Advanced Studies ICREA, Barcelona (Spain)

Knowledge of the mean-free-path distribution of heat-carrying phonons is key to understanding phonon-mediated thermal transport. We show that thermal conductivity measurements of thin membranes spanning a wide thickness range can be used to characterize how bulk thermal conductivity is distributed over phonon mean free paths. A noncontact transient thermal grating technique was used to measure the thermal conductivity of suspended Si membranes ranging from 15–1500 nm in thickness. A decrease in the thermal conductivity from 74–13% of the bulk value is observed over this thickness range, which is attributed to diffuse phonon boundary scattering. Because of the well-defined relation between the membrane thickness and phonon mean-free-path suppression, combined with the range and accuracy of the measurements, we can reconstruct the bulk thermal conductivity accumulation vs. phonon mean free path, and compare with theoretical models.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0001299; FG02-09ER46577

OSTI ID:: 1370995

Alternate ID(s):: OSTI ID: 1185130

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 24; Related Information: S3TEC partners with Massachusetts Institute of Technology (lead); Boston College; Oak Ridge National Laboratory; Rensselaer Polytechnic Institute; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 102 works

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75 CONDENSED MATTER PHYSICS
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