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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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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. |
format | Online Article Text |
id | pubmed-5959854 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
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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