| Heat-flow properties of systems with alternate masses or alternate on-site potentials. | |
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MedLine Citation:
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PMID: 21867122 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We address a central issue of phononics: the search of properties or mechanisms to manage the heat flow in reliable materials. We analytically study standard and simple systems modeling the heat flow in solids, namely, the harmonic, self-consistent harmonic and also anharmonic chains of oscillators, and we show an interesting insulating effect: While in the homogeneous models the heat flow decays as the inverse of the particle mass, in the chain with alternate masses it decays as the inverse of the square of the mass difference, that is, it decays essentially as the mass ratio (between the smaller and the larger one) for a large mass difference. A similar effect holds if we alternate on-site potentials instead of particle masses. The existence of such behavior in these different systems, including anharmonic models, indicates that it is a ubiquitous phenomenon with applications in the heat flow control. |
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Authors:
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Emmanuel Pereira; Leonardo M Santana; Ricardo Avila |
Publication Detail:
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Type: Journal Article Date: 2011-07-13 |
Journal Detail:
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Title: Physical review. E, Statistical, nonlinear, and soft matter physics Volume: 84 ISSN: 1550-2376 ISO Abbreviation: Phys Rev E Stat Nonlin Soft Matter Phys Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-08-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101136452 Medline TA: Phys Rev E Stat Nonlin Soft Matter Phys Country: United States |
Other Details:
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Languages: eng Pagination: 011116 Citation Subset: IM |
Affiliation:
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Departamento de Física-ICEx, UFMG, CP 702, 30.161-970 Belo Horizonte MG, Brazil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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