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Atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure

The ability to controllably manipulate complex topological polar configurations such as polar flux-closures via external stimuli may allow the construction of new electromechanical and nanoelectronic devices. Here, using atomically resolved in situ scanning transmission electron microscopy, we find...

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Autores principales: Li, Xiaomei, Tan, Congbing, Liu, Chang, Gao, Peng, Sun, Yuanwei, Chen, Pan, Li, Mingqiang, Liao, Lei, Zhu, Ruixue, Wang, Jinbin, Zhao, Yanchong, Wang, Lifen, Xu, Zhi, Liu, Kaihui, Zhong, Xiangli, Wang, Jie, Bai, Xuedong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Academy of Sciences 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7430988/
https://www.ncbi.nlm.nih.gov/pubmed/32709747
http://dx.doi.org/10.1073/pnas.2007248117
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author Li, Xiaomei
Tan, Congbing
Liu, Chang
Gao, Peng
Sun, Yuanwei
Chen, Pan
Li, Mingqiang
Liao, Lei
Zhu, Ruixue
Wang, Jinbin
Zhao, Yanchong
Wang, Lifen
Xu, Zhi
Liu, Kaihui
Zhong, Xiangli
Wang, Jie
Bai, Xuedong
author_facet Li, Xiaomei
Tan, Congbing
Liu, Chang
Gao, Peng
Sun, Yuanwei
Chen, Pan
Li, Mingqiang
Liao, Lei
Zhu, Ruixue
Wang, Jinbin
Zhao, Yanchong
Wang, Lifen
Xu, Zhi
Liu, Kaihui
Zhong, Xiangli
Wang, Jie
Bai, Xuedong
author_sort Li, Xiaomei
collection PubMed
description The ability to controllably manipulate complex topological polar configurations such as polar flux-closures via external stimuli may allow the construction of new electromechanical and nanoelectronic devices. Here, using atomically resolved in situ scanning transmission electron microscopy, we find that the polar flux-closures in PbTiO(3)/SrTiO(3) superlattice films are mobile and can be reversibly switched to ordinary single ferroelectric c or a domains under an applied electric field or stress. Specifically, the electric field initially drives movement of a flux-closure via domain wall motion and then breaks it to form intermediate a/c striped domains, whereas mechanical stress first squeezes the core of a flux-closure toward the interface and then form a/c domains with disappearance of the core. After removal of the external stimulus, the flux-closure structure spontaneously recovers. These observations can be precisely reproduced by phase field simulations, which also reveal the evolutions of the competing energies during phase transitions. Such reversible switching between flux-closures and ordinary ferroelectric states provides a foundation for potential electromechanical and nanoelectronic applications.
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spelling pubmed-74309882020-08-27 Atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure Li, Xiaomei Tan, Congbing Liu, Chang Gao, Peng Sun, Yuanwei Chen, Pan Li, Mingqiang Liao, Lei Zhu, Ruixue Wang, Jinbin Zhao, Yanchong Wang, Lifen Xu, Zhi Liu, Kaihui Zhong, Xiangli Wang, Jie Bai, Xuedong Proc Natl Acad Sci U S A Physical Sciences The ability to controllably manipulate complex topological polar configurations such as polar flux-closures via external stimuli may allow the construction of new electromechanical and nanoelectronic devices. Here, using atomically resolved in situ scanning transmission electron microscopy, we find that the polar flux-closures in PbTiO(3)/SrTiO(3) superlattice films are mobile and can be reversibly switched to ordinary single ferroelectric c or a domains under an applied electric field or stress. Specifically, the electric field initially drives movement of a flux-closure via domain wall motion and then breaks it to form intermediate a/c striped domains, whereas mechanical stress first squeezes the core of a flux-closure toward the interface and then form a/c domains with disappearance of the core. After removal of the external stimulus, the flux-closure structure spontaneously recovers. These observations can be precisely reproduced by phase field simulations, which also reveal the evolutions of the competing energies during phase transitions. Such reversible switching between flux-closures and ordinary ferroelectric states provides a foundation for potential electromechanical and nanoelectronic applications. National Academy of Sciences 2020-08-11 2020-07-24 /pmc/articles/PMC7430988/ /pubmed/32709747 http://dx.doi.org/10.1073/pnas.2007248117 Text en Copyright © 2020 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/ https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) .
spellingShingle Physical Sciences
Li, Xiaomei
Tan, Congbing
Liu, Chang
Gao, Peng
Sun, Yuanwei
Chen, Pan
Li, Mingqiang
Liao, Lei
Zhu, Ruixue
Wang, Jinbin
Zhao, Yanchong
Wang, Lifen
Xu, Zhi
Liu, Kaihui
Zhong, Xiangli
Wang, Jie
Bai, Xuedong
Atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure
title Atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure
title_full Atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure
title_fullStr Atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure
title_full_unstemmed Atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure
title_short Atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure
title_sort atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure
topic Physical Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7430988/
https://www.ncbi.nlm.nih.gov/pubmed/32709747
http://dx.doi.org/10.1073/pnas.2007248117
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