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Remote heat dissipation in atom-sized contacts

Understanding and control of heat dissipation is an important challenge in nanoelectronics wherein field-accelerated hot carriers in current-carrying ballistic systems release a large part of the kinetic energy into external bulk phonon baths. Here we report on a physical mechanism of this remote he...

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Autores principales: Tsutsui, Makusu, Morikawa, Takanori, Yokota, Kazumichi, Taniguchi, Masateru
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5959854/
https://www.ncbi.nlm.nih.gov/pubmed/29777130
http://dx.doi.org/10.1038/s41598-018-26203-z
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author Tsutsui, Makusu
Morikawa, Takanori
Yokota, Kazumichi
Taniguchi, Masateru
author_facet Tsutsui, Makusu
Morikawa, Takanori
Yokota, Kazumichi
Taniguchi, Masateru
author_sort Tsutsui, Makusu
collection PubMed
description Understanding and control of heat dissipation is an important challenge in nanoelectronics wherein field-accelerated hot carriers in current-carrying ballistic systems release a large part of the kinetic energy into external bulk phonon baths. Here we report on a physical mechanism of this remote heat dissipation and its role on the stability of atomic contacts. We used a nano-fabricated thermocouple to directly characterize the self-heating in a mechanically-configurable Au junction. We found more pronounced heat dissipation at the current downstream that signifies the electron-hole asymmetry in Au nanocontacts. Meanwhile, the simultaneously measured single-atom chain lifetime revealed a minor influence of the heat dissipation on the contact stability by virtue of microleads serving as an effective heat spreader to moderate the temperature rise to several Kelvins from the ambient under microwatt input power. The present finding can be used for practical design of atomic and molecular electronic devices for heat dissipation managements.
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spelling pubmed-59598542018-05-24 Remote heat dissipation in atom-sized contacts Tsutsui, Makusu Morikawa, Takanori Yokota, Kazumichi Taniguchi, Masateru Sci Rep Article Understanding and control of heat dissipation is an important challenge in nanoelectronics wherein field-accelerated hot carriers in current-carrying ballistic systems release a large part of the kinetic energy into external bulk phonon baths. Here we report on a physical mechanism of this remote heat dissipation and its role on the stability of atomic contacts. We used a nano-fabricated thermocouple to directly characterize the self-heating in a mechanically-configurable Au junction. We found more pronounced heat dissipation at the current downstream that signifies the electron-hole asymmetry in Au nanocontacts. Meanwhile, the simultaneously measured single-atom chain lifetime revealed a minor influence of the heat dissipation on the contact stability by virtue of microleads serving as an effective heat spreader to moderate the temperature rise to several Kelvins from the ambient under microwatt input power. The present finding can be used for practical design of atomic and molecular electronic devices for heat dissipation managements. Nature Publishing Group UK 2018-05-18 /pmc/articles/PMC5959854/ /pubmed/29777130 http://dx.doi.org/10.1038/s41598-018-26203-z Text en © The Author(s) 2018 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
Morikawa, Takanori
Yokota, Kazumichi
Taniguchi, Masateru
Remote heat dissipation in atom-sized contacts
title Remote heat dissipation in atom-sized contacts
title_full Remote heat dissipation in atom-sized contacts
title_fullStr Remote heat dissipation in atom-sized contacts
title_full_unstemmed Remote heat dissipation in atom-sized contacts
title_short Remote heat dissipation in atom-sized contacts
title_sort remote heat dissipation in atom-sized contacts
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5959854/
https://www.ncbi.nlm.nih.gov/pubmed/29777130
http://dx.doi.org/10.1038/s41598-018-26203-z
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