Anomalous thermoelectricity in strained Bi(2)Te(3) films

Bi(2)Te(3)-based alloys have been intensively used for thermoelectric coolers and generators due to their high Seebeck coefficient S. So far, efforts to improve the S have been made mostly on changing the structures and components. Herein, we demonstrate an anomalous thermoelectricity in strained Bi...

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Autores principales: Liu, Yucong, Chen, Jiadong, Deng, Huiyong, Hu, Gujin, Zhu, Daming, Dai, Ning
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5013394/
https://www.ncbi.nlm.nih.gov/pubmed/27600406
http://dx.doi.org/10.1038/srep32661
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author Liu, Yucong
Chen, Jiadong
Deng, Huiyong
Hu, Gujin
Zhu, Daming
Dai, Ning
author_facet Liu, Yucong
Chen, Jiadong
Deng, Huiyong
Hu, Gujin
Zhu, Daming
Dai, Ning
author_sort Liu, Yucong
collection PubMed
description Bi(2)Te(3)-based alloys have been intensively used for thermoelectric coolers and generators due to their high Seebeck coefficient S. So far, efforts to improve the S have been made mostly on changing the structures and components. Herein, we demonstrate an anomalous thermoelectricity in strained Bi(2)Te(3) films, i.e., the value of S is obviously changed after reversing the direction of temperature gradient. Further theoretical and experimental analysis shows that it originates from the coupling of thermoelectric and flexoelectric effects caused by a stress gradient. Our finding provides a new avenue to adjust the S of Bi(2)Te(3)-based thermoelectric materials through flexoelectric polarization.
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spelling pubmed-50133942016-09-12 Anomalous thermoelectricity in strained Bi(2)Te(3) films Liu, Yucong Chen, Jiadong Deng, Huiyong Hu, Gujin Zhu, Daming Dai, Ning Sci Rep Article Bi(2)Te(3)-based alloys have been intensively used for thermoelectric coolers and generators due to their high Seebeck coefficient S. So far, efforts to improve the S have been made mostly on changing the structures and components. Herein, we demonstrate an anomalous thermoelectricity in strained Bi(2)Te(3) films, i.e., the value of S is obviously changed after reversing the direction of temperature gradient. Further theoretical and experimental analysis shows that it originates from the coupling of thermoelectric and flexoelectric effects caused by a stress gradient. Our finding provides a new avenue to adjust the S of Bi(2)Te(3)-based thermoelectric materials through flexoelectric polarization. Nature Publishing Group 2016-09-07 /pmc/articles/PMC5013394/ /pubmed/27600406 http://dx.doi.org/10.1038/srep32661 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Liu, Yucong
Chen, Jiadong
Deng, Huiyong
Hu, Gujin
Zhu, Daming
Dai, Ning
Anomalous thermoelectricity in strained Bi(2)Te(3) films
title Anomalous thermoelectricity in strained Bi(2)Te(3) films
title_full Anomalous thermoelectricity in strained Bi(2)Te(3) films
title_fullStr Anomalous thermoelectricity in strained Bi(2)Te(3) films
title_full_unstemmed Anomalous thermoelectricity in strained Bi(2)Te(3) films
title_short Anomalous thermoelectricity in strained Bi(2)Te(3) films
title_sort anomalous thermoelectricity in strained bi(2)te(3) films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5013394/
https://www.ncbi.nlm.nih.gov/pubmed/27600406
http://dx.doi.org/10.1038/srep32661
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