English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/131813
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

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

AuthorsCuffe, John CSIC ORCID; Eliason, Jeffrey K.; Maznev, A. A.; Collins, Kimberlee C.; Johnson, Jeremy A.; Shchepetov, A.; Prunnila, M.; Ahopelto, J.; Sotomayor Torres, C. M. CSIC ORCID; Chen, Gang; Nelson, Keith A.
Issue Date2015
PublisherAmerican Physical Society
CitationPhysical Review B 91(24): 245423 (2015)
AbstractKnowledge of the mean-free-path distribution of heat-carrying phonons is key to understanding phonon-mediated thermal transport. We demonstrate 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. Due to 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.
DescriptionUnder the terms of the Creative Commons Attribution License 3.0 (CC-BY).
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.91.245423
URIhttp://hdl.handle.net/10261/131813
DOIhttp://dx.doi.org/10.1103/PhysRevB.91.245423
Identifiersdoi: 10.1103/PhysRevB.91.245423
issn: 2469-9950
e-issn: 2469-9969
Appears in Collections:(CIN2) Artículos
Files in This Item:
File Description SizeFormat 
mean-free-path.pdf596,78 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.