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Heat dissipation in quasi-ballistic single-atom contacts at room temperature

We report on evaluations of local heating in Au single-atom chains at room temperature. We performed onsite thermometry of atomic-scale Au junctions under applied sinusoidal voltage of variable amplitudes. The AC approach enabled to preclude electromigration effects for characterizing the influence...

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Autores principales: Tsutsui, Makusu, Chen, Yu-Chang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6904740/
https://www.ncbi.nlm.nih.gov/pubmed/31822731
http://dx.doi.org/10.1038/s41598-019-55048-3
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author Tsutsui, Makusu
Chen, Yu-Chang
author_facet Tsutsui, Makusu
Chen, Yu-Chang
author_sort Tsutsui, Makusu
collection PubMed
description We report on evaluations of local heating in Au single-atom chains at room temperature. We performed onsite thermometry of atomic-scale Au junctions under applied sinusoidal voltage of variable amplitudes. The AC approach enabled to preclude electromigration effects for characterizing the influence of energy dissipations on the lifetime. We elucidated nonlinear increase in the effective temperature of the current-carrying single-atom chains with the voltage amplitudes, which was attributed to subtle interplay between electron-phonon scattering and electron-mediated thermal transport in the quasi-ballistic conductor. We also found that only 0.2% of the electric power contributed to local heating while the majority was consumed at the diffusive bank. The present findings can be used for thermal management of future integrated nanoelectronics.
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spelling pubmed-69047402019-12-13 Heat dissipation in quasi-ballistic single-atom contacts at room temperature Tsutsui, Makusu Chen, Yu-Chang Sci Rep Article We report on evaluations of local heating in Au single-atom chains at room temperature. We performed onsite thermometry of atomic-scale Au junctions under applied sinusoidal voltage of variable amplitudes. The AC approach enabled to preclude electromigration effects for characterizing the influence of energy dissipations on the lifetime. We elucidated nonlinear increase in the effective temperature of the current-carrying single-atom chains with the voltage amplitudes, which was attributed to subtle interplay between electron-phonon scattering and electron-mediated thermal transport in the quasi-ballistic conductor. We also found that only 0.2% of the electric power contributed to local heating while the majority was consumed at the diffusive bank. The present findings can be used for thermal management of future integrated nanoelectronics. Nature Publishing Group UK 2019-12-10 /pmc/articles/PMC6904740/ /pubmed/31822731 http://dx.doi.org/10.1038/s41598-019-55048-3 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Tsutsui, Makusu
Chen, Yu-Chang
Heat dissipation in quasi-ballistic single-atom contacts at room temperature
title Heat dissipation in quasi-ballistic single-atom contacts at room temperature
title_full Heat dissipation in quasi-ballistic single-atom contacts at room temperature
title_fullStr Heat dissipation in quasi-ballistic single-atom contacts at room temperature
title_full_unstemmed Heat dissipation in quasi-ballistic single-atom contacts at room temperature
title_short Heat dissipation in quasi-ballistic single-atom contacts at room temperature
title_sort heat dissipation in quasi-ballistic single-atom contacts at room temperature
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6904740/
https://www.ncbi.nlm.nih.gov/pubmed/31822731
http://dx.doi.org/10.1038/s41598-019-55048-3
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