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Coherent Thermal Conduction in Silicon Nanowires with Periodic Wings
Artificial periodic nanostructures, known as phononic crystals, promise to control the thermal properties of nanostructures in the coherent regime, which can be achieved in semiconductors at low temperatures. Here, we study coherent thermal conduction in silicon nanowires with added periodic wings a...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6410301/ https://www.ncbi.nlm.nih.gov/pubmed/30678318 http://dx.doi.org/10.3390/nano9020142 |
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author | Anufriev, Roman Nomura, Masahiro |
author_facet | Anufriev, Roman Nomura, Masahiro |
author_sort | Anufriev, Roman |
collection | PubMed |
description | Artificial periodic nanostructures, known as phononic crystals, promise to control the thermal properties of nanostructures in the coherent regime, which can be achieved in semiconductors at low temperatures. Here, we study coherent thermal conduction in silicon nanowires with added periodic wings at sub-Kelvin temperature. Our simulations show that the added periodic wings flatten the phonon dispersion and thus reduce the thermal conductance. We investigate the dependence of this reduction on the size of the wings and conclude that the reduction is mainly caused by the periodicity of the wings, rather than by local resonances in them. These findings help to better understand the mechanisms controlling coherent heat conduction in periodic resonant nanostructures. |
format | Online Article Text |
id | pubmed-6410301 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-64103012019-03-29 Coherent Thermal Conduction in Silicon Nanowires with Periodic Wings Anufriev, Roman Nomura, Masahiro Nanomaterials (Basel) Article Artificial periodic nanostructures, known as phononic crystals, promise to control the thermal properties of nanostructures in the coherent regime, which can be achieved in semiconductors at low temperatures. Here, we study coherent thermal conduction in silicon nanowires with added periodic wings at sub-Kelvin temperature. Our simulations show that the added periodic wings flatten the phonon dispersion and thus reduce the thermal conductance. We investigate the dependence of this reduction on the size of the wings and conclude that the reduction is mainly caused by the periodicity of the wings, rather than by local resonances in them. These findings help to better understand the mechanisms controlling coherent heat conduction in periodic resonant nanostructures. MDPI 2019-01-22 /pmc/articles/PMC6410301/ /pubmed/30678318 http://dx.doi.org/10.3390/nano9020142 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Anufriev, Roman Nomura, Masahiro Coherent Thermal Conduction in Silicon Nanowires with Periodic Wings |
title | Coherent Thermal Conduction in Silicon Nanowires with Periodic Wings |
title_full | Coherent Thermal Conduction in Silicon Nanowires with Periodic Wings |
title_fullStr | Coherent Thermal Conduction in Silicon Nanowires with Periodic Wings |
title_full_unstemmed | Coherent Thermal Conduction in Silicon Nanowires with Periodic Wings |
title_short | Coherent Thermal Conduction in Silicon Nanowires with Periodic Wings |
title_sort | coherent thermal conduction in silicon nanowires with periodic wings |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6410301/ https://www.ncbi.nlm.nih.gov/pubmed/30678318 http://dx.doi.org/10.3390/nano9020142 |
work_keys_str_mv | AT anufrievroman coherentthermalconductioninsiliconnanowireswithperiodicwings AT nomuramasahiro coherentthermalconductioninsiliconnanowireswithperiodicwings |