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Quantum Confinement Suppressing Electronic Heat Flow below the Wiedemann–Franz Law
[Image: see text] The Wiedemann–Franz law states that the charge conductance and the electronic contribution to the heat conductance are proportional. This sets stringent constraints on efficiency bounds for thermoelectric applications, which seek a large charge conduction in response to a small hea...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8802316/ https://www.ncbi.nlm.nih.gov/pubmed/35030004 http://dx.doi.org/10.1021/acs.nanolett.1c03437 |
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author | Majidi, Danial Josefsson, Martin Kumar, Mukesh Leijnse, Martin Samuelson, Lars Courtois, Hervé Winkelmann, Clemens B. Maisi, Ville F. |
author_facet | Majidi, Danial Josefsson, Martin Kumar, Mukesh Leijnse, Martin Samuelson, Lars Courtois, Hervé Winkelmann, Clemens B. Maisi, Ville F. |
author_sort | Majidi, Danial |
collection | PubMed |
description | [Image: see text] The Wiedemann–Franz law states that the charge conductance and the electronic contribution to the heat conductance are proportional. This sets stringent constraints on efficiency bounds for thermoelectric applications, which seek a large charge conduction in response to a small heat flow. We present experiments based on a quantum dot formed inside a semiconducting InAs nanowire transistor, in which the heat conduction can be tuned significantly below the Wiedemann–Franz prediction. Comparison with scattering theory shows that this is caused by quantum confinement and the resulting energy-selective transport properties of the quantum dot. Our results open up perspectives for tailoring independently the heat and electrical conduction properties in semiconductor nanostructures. |
format | Online Article Text |
id | pubmed-8802316 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-88023162022-02-01 Quantum Confinement Suppressing Electronic Heat Flow below the Wiedemann–Franz Law Majidi, Danial Josefsson, Martin Kumar, Mukesh Leijnse, Martin Samuelson, Lars Courtois, Hervé Winkelmann, Clemens B. Maisi, Ville F. Nano Lett [Image: see text] The Wiedemann–Franz law states that the charge conductance and the electronic contribution to the heat conductance are proportional. This sets stringent constraints on efficiency bounds for thermoelectric applications, which seek a large charge conduction in response to a small heat flow. We present experiments based on a quantum dot formed inside a semiconducting InAs nanowire transistor, in which the heat conduction can be tuned significantly below the Wiedemann–Franz prediction. Comparison with scattering theory shows that this is caused by quantum confinement and the resulting energy-selective transport properties of the quantum dot. Our results open up perspectives for tailoring independently the heat and electrical conduction properties in semiconductor nanostructures. American Chemical Society 2022-01-14 2022-01-26 /pmc/articles/PMC8802316/ /pubmed/35030004 http://dx.doi.org/10.1021/acs.nanolett.1c03437 Text en © 2022 American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Majidi, Danial Josefsson, Martin Kumar, Mukesh Leijnse, Martin Samuelson, Lars Courtois, Hervé Winkelmann, Clemens B. Maisi, Ville F. Quantum Confinement Suppressing Electronic Heat Flow below the Wiedemann–Franz Law |
title | Quantum Confinement Suppressing Electronic Heat Flow
below the Wiedemann–Franz Law |
title_full | Quantum Confinement Suppressing Electronic Heat Flow
below the Wiedemann–Franz Law |
title_fullStr | Quantum Confinement Suppressing Electronic Heat Flow
below the Wiedemann–Franz Law |
title_full_unstemmed | Quantum Confinement Suppressing Electronic Heat Flow
below the Wiedemann–Franz Law |
title_short | Quantum Confinement Suppressing Electronic Heat Flow
below the Wiedemann–Franz Law |
title_sort | quantum confinement suppressing electronic heat flow
below the wiedemann–franz law |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8802316/ https://www.ncbi.nlm.nih.gov/pubmed/35030004 http://dx.doi.org/10.1021/acs.nanolett.1c03437 |
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