Heat transport in ultrathin dielectric membranes and bridges

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Kühn, T.
dc.contributor.author Anghel, D. V.
dc.contributor.author Pekola, Jukka P.
dc.contributor.author Manninen, M.
dc.contributor.author Galperin, Y. M.
dc.date.accessioned 2015-05-27T09:00:55Z
dc.date.available 2015-05-27T09:00:55Z
dc.date.issued 2004
dc.identifier.citation Kühn, T. & Anghel, D. V. & Pekola, Jukka & Manninen, M. & Galperin, Y. M. 2004. Heat transport in ultrathin dielectric membranes and bridges. Physical Review B. Volume 70, Issue 12. 125425/1-6. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.70.125425. en
dc.identifier.issn 1098-0121 (printed)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/16253
dc.description.abstract Phonon modes and their dispersion relations in ultrathin homogeneous dielectric membranes are calculated using elasticity theory. The approach differs from the previous ones by a rigorous account of the effect of the film surfaces on the modes with different polarizations. We compute the heat capacity of membranes and the heat conductivity of narrow bridges cut out of such membranes, in a temperature range where the dimensions have a strong influence on the results. In the high-temperature regime we recover the three-dimensional bulk results. However, in the low-temperature limit the heat capacity CV is proportional to T (temperature), while the heat conductivity κ of narrow bridges is proportional to T3∕2, leading to a thermal cutoff frequency fc=κ/CV∝T1∕2. en
dc.format.extent 125425/1-6
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society (APS) en
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 70, Issue 12
dc.rights © 2004 American Physical Society (APS). http://www.aps.org/ en
dc.subject.other Physics en
dc.title Heat transport in ultrathin dielectric membranes and bridges en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Physical Society (APS)
dc.contributor.school Perustieteiden korkeakoulu fi
dc.contributor.school School of Science en
dc.contributor.department Department of Applied Physics en
dc.contributor.department Teknillisen fysiikan laitos fi
dc.subject.keyword phonon modes en
dc.subject.keyword dielectric membranes en
dc.subject.keyword film surfaces en
dc.subject.keyword polarization en
dc.subject.keyword heat capacity en
dc.subject.keyword heat conductivity en
dc.identifier.urn URN:NBN:fi:aalto-201505262892
dc.type.dcmitype text en
dc.identifier.doi 10.1103/physrevb.70.125425
dc.type.version Final published version en

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