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Phonon localization in heat conduction

Nondiffusive phonon thermal transport, extensively observed in nanostructures, has largely been attributed to classical size effects, ignoring the wave nature of phonons. We report localization behavior in phonon heat conduction due to multiple scattering and interference events of broadband phonons...

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Detalles Bibliográficos
Autores principales: Luckyanova, M. N., Mendoza, J., Lu, H., Song, B., Huang, S., Zhou, J., Li, M., Dong, Y., Zhou, H., Garlow, J., Wu, L., Kirby, B. J., Grutter, A. J., Puretzky, A. A., Zhu, Y., Dresselhaus, M. S., Gossard, A., Chen, G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6303120/
https://www.ncbi.nlm.nih.gov/pubmed/30588489
http://dx.doi.org/10.1126/sciadv.aat9460
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author Luckyanova, M. N.
Mendoza, J.
Lu, H.
Song, B.
Huang, S.
Zhou, J.
Li, M.
Dong, Y.
Zhou, H.
Garlow, J.
Wu, L.
Kirby, B. J.
Grutter, A. J.
Puretzky, A. A.
Zhu, Y.
Dresselhaus, M. S.
Gossard, A.
Chen, G.
author_facet Luckyanova, M. N.
Mendoza, J.
Lu, H.
Song, B.
Huang, S.
Zhou, J.
Li, M.
Dong, Y.
Zhou, H.
Garlow, J.
Wu, L.
Kirby, B. J.
Grutter, A. J.
Puretzky, A. A.
Zhu, Y.
Dresselhaus, M. S.
Gossard, A.
Chen, G.
author_sort Luckyanova, M. N.
collection PubMed
description Nondiffusive phonon thermal transport, extensively observed in nanostructures, has largely been attributed to classical size effects, ignoring the wave nature of phonons. We report localization behavior in phonon heat conduction due to multiple scattering and interference events of broadband phonons, by measuring the thermal conductivities of GaAs/AlAs superlattices with ErAs nanodots randomly distributed at the interfaces. With an increasing number of superlattice periods, the measured thermal conductivities near room temperature increased and eventually saturated, indicating a transition from ballistic to diffusive transport. In contrast, at cryogenic temperatures the thermal conductivities first increased but then decreased, signaling phonon wave localization, as supported by atomistic Greenșs function simulations. The discovery of phonon localization suggests a new path forward for engineering phonon thermal transport.
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spelling pubmed-63031202018-12-26 Phonon localization in heat conduction Luckyanova, M. N. Mendoza, J. Lu, H. Song, B. Huang, S. Zhou, J. Li, M. Dong, Y. Zhou, H. Garlow, J. Wu, L. Kirby, B. J. Grutter, A. J. Puretzky, A. A. Zhu, Y. Dresselhaus, M. S. Gossard, A. Chen, G. Sci Adv Research Articles Nondiffusive phonon thermal transport, extensively observed in nanostructures, has largely been attributed to classical size effects, ignoring the wave nature of phonons. We report localization behavior in phonon heat conduction due to multiple scattering and interference events of broadband phonons, by measuring the thermal conductivities of GaAs/AlAs superlattices with ErAs nanodots randomly distributed at the interfaces. With an increasing number of superlattice periods, the measured thermal conductivities near room temperature increased and eventually saturated, indicating a transition from ballistic to diffusive transport. In contrast, at cryogenic temperatures the thermal conductivities first increased but then decreased, signaling phonon wave localization, as supported by atomistic Greenșs function simulations. The discovery of phonon localization suggests a new path forward for engineering phonon thermal transport. American Association for the Advancement of Science 2018-12-21 /pmc/articles/PMC6303120/ /pubmed/30588489 http://dx.doi.org/10.1126/sciadv.aat9460 Text en Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Luckyanova, M. N.
Mendoza, J.
Lu, H.
Song, B.
Huang, S.
Zhou, J.
Li, M.
Dong, Y.
Zhou, H.
Garlow, J.
Wu, L.
Kirby, B. J.
Grutter, A. J.
Puretzky, A. A.
Zhu, Y.
Dresselhaus, M. S.
Gossard, A.
Chen, G.
Phonon localization in heat conduction
title Phonon localization in heat conduction
title_full Phonon localization in heat conduction
title_fullStr Phonon localization in heat conduction
title_full_unstemmed Phonon localization in heat conduction
title_short Phonon localization in heat conduction
title_sort phonon localization in heat conduction
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6303120/
https://www.ncbi.nlm.nih.gov/pubmed/30588489
http://dx.doi.org/10.1126/sciadv.aat9460
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