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dc.contributor.authorZebarjadi, Mona
dc.contributor.authorYang, Jian
dc.contributor.authorLukas, Kevin
dc.contributor.authorKozinsky, Boris
dc.contributor.authorYu, Bo
dc.contributor.authorDresselhaus, Mildred
dc.contributor.authorOpeil, Cyril
dc.contributor.authorRen, Zhifeng
dc.contributor.authorChen, Gang
dc.date.accessioned2013-04-04T16:40:35Z
dc.date.available2013-04-04T16:40:35Z
dc.date.issued2012-08
dc.date.submitted2012-07
dc.identifier.issn0021-8979
dc.identifier.issn1089-7550
dc.identifier.urihttp://hdl.handle.net/1721.1/78284
dc.description.abstractExperimental thermal conductivity of bulk materials are often modeled using Debye approximation together with functional forms of relaxation time with fitting parameters. While such models can fit the temperature dependence of thermal conductivity of bulk materials, the Debye approximation leads to large error in the actual phonon mean free path, and consequently, the predictions of the thermal conductivity of the nanostructured materials using the same relaxation time are not correct even after considering additional size effect on the mean free path. We investigate phonon mean free path distribution inside fully unfilled (Co4Sb12) and fully filled (LaFe4Sb12) bulk skutterudites by fitting their thermal conductivity to analytical models which employ different phonon dispersions. We show that theoretical thermal conductivity predictions of the nanostructured samples are in agreement with the experimental data obtained for samples of different grain sizes only when the full phonon dispersion is considered.en_US
dc.description.sponsorshipMassachusetts Institute of Technology. Energy Initiativeen_US
dc.description.sponsorshipUnited States. Dept. of Energy (MIT S3TEC, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science; Office of Basic Energy Sciences under Award No. DE-FG02-09ER46577)en_US
dc.description.sponsorshipRobert Bosch GmbHen_US
dc.language.isoen_US
dc.publisherAmerican Institute of Physicsen_US
dc.relation.isversionofhttp://dx.doi.org/10.1063/1.4747911en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceMIT web domainen_US
dc.titleRole of phonon dispersion in studying phonon mean free paths in skutteruditesen_US
dc.typeArticleen_US
dc.identifier.citationZebarjadi, Mona et al. “Role of Phonon Dispersion in Studying Phonon Mean Free Paths in Skutterudites.” Journal of Applied Physics 112.4 (2012): 044305. CrossRef. Web.© 2012 American Institute of Physics.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Scienceen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Mechanical Engineeringen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.mitauthorDresselhaus, Mildred
dc.contributor.mitauthorZebarjadi, Mona
dc.contributor.mitauthorChen, Gang
dc.relation.journalJournal of Applied Physicsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsZebarjadi, Mona; Yang, Jian; Lukas, Kevin; Kozinsky, Boris; Yu, Bo; Dresselhaus, Mildred S.; Opeil, Cyril; Ren, Zhifeng; Chen, Gangen
dc.identifier.orcidhttps://orcid.org/0000-0001-8492-2261
dc.identifier.orcidhttps://orcid.org/0000-0002-3968-8530
mit.licensePUBLISHER_POLICYen_US


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