Thermoelectricity of near-resonant tunnel junctions and their relation to Carnot efficiency

Abstract We present a conceptual study motivated by electrical and thermoelectrical measurements on various near-resonant tunnel junctions. The squeezable nano junction technique allows the quasi-synchronous measurement of conductance G, I(V) characteristics and Seebeck coefficient S. Correlations b...

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Autores principales:	Matthias A. Popp, André Erpenbeck, Heiko B. Weber
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5e56395723664c15b1e46a39818c310b
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spelling	oai:doaj.org-article:5e56395723664c15b1e46a39818c310b2021-12-02T11:50:40ZThermoelectricity of near-resonant tunnel junctions and their relation to Carnot efficiency10.1038/s41598-021-81466-32045-2322https://doaj.org/article/5e56395723664c15b1e46a39818c310b2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81466-3https://doaj.org/toc/2045-2322Abstract We present a conceptual study motivated by electrical and thermoelectrical measurements on various near-resonant tunnel junctions. The squeezable nano junction technique allows the quasi-synchronous measurement of conductance G, I(V) characteristics and Seebeck coefficient S. Correlations between G and S are uncovered, in particular boundaries for S(G). We find the simplest and consistent description of the observed phenomena in the framework of the single level resonant tunneling model within which measuring I(V) and S suffice for determining all model parameters. We can further employ the model for assigning thermoelectric efficiencies $$\eta $$ η without measuring the heat flow. Within the ensemble of thermoelectric data, junctions with assigned $$\eta $$ η close to the Carnot limit can be identified. These insights allow providing design rules for optimized thermoelectric efficiency in nanoscale junctions.Matthias A. PoppAndré ErpenbeckHeiko B. WeberNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Matthias A. Popp André Erpenbeck Heiko B. Weber Thermoelectricity of near-resonant tunnel junctions and their relation to Carnot efficiency
description	Abstract We present a conceptual study motivated by electrical and thermoelectrical measurements on various near-resonant tunnel junctions. The squeezable nano junction technique allows the quasi-synchronous measurement of conductance G, I(V) characteristics and Seebeck coefficient S. Correlations between G and S are uncovered, in particular boundaries for S(G). We find the simplest and consistent description of the observed phenomena in the framework of the single level resonant tunneling model within which measuring I(V) and S suffice for determining all model parameters. We can further employ the model for assigning thermoelectric efficiencies $$\eta $$ η without measuring the heat flow. Within the ensemble of thermoelectric data, junctions with assigned $$\eta $$ η close to the Carnot limit can be identified. These insights allow providing design rules for optimized thermoelectric efficiency in nanoscale junctions.
format	article
author	Matthias A. Popp André Erpenbeck Heiko B. Weber
author_facet	Matthias A. Popp André Erpenbeck Heiko B. Weber
author_sort	Matthias A. Popp
title	Thermoelectricity of near-resonant tunnel junctions and their relation to Carnot efficiency
title_short	Thermoelectricity of near-resonant tunnel junctions and their relation to Carnot efficiency
title_full	Thermoelectricity of near-resonant tunnel junctions and their relation to Carnot efficiency
title_fullStr	Thermoelectricity of near-resonant tunnel junctions and their relation to Carnot efficiency
title_full_unstemmed	Thermoelectricity of near-resonant tunnel junctions and their relation to Carnot efficiency
title_sort	thermoelectricity of near-resonant tunnel junctions and their relation to carnot efficiency
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/5e56395723664c15b1e46a39818c310b
work_keys_str_mv	AT matthiasapopp thermoelectricityofnearresonanttunneljunctionsandtheirrelationtocarnotefficiency AT andreerpenbeck thermoelectricityofnearresonanttunneljunctionsandtheirrelationtocarnotefficiency AT heikobweber thermoelectricityofnearresonanttunneljunctionsandtheirrelationtocarnotefficiency
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Thermoelectricity of near-resonant tunnel junctions and their relation to Carnot efficiency

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