globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2007248117
论文题名:
Atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure
作者: Li X.; Tan C.; Liu C.; Gao P.; p-gao@pku.edu.cn; Sun Y.; Chen P.; Li M.; Liao L.; Zhu R.; Wang J.; Zhao Y.; Wang L.; Xu Z.; Liu K.; Zhong X.; xlzhong@xtu.edu.cn; Wang J.; jw@zju.edu.cn; Bai X.; xdbai@iphy.ac.cn
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:32
起始页码: 18954
结束页码: 18961
语种: 英语
Scopus关键词: Article ; controlled study ; electric field ; electrical parameters ; mechanical stress ; phase transition ; polar flux closure ; priority journal ; scanning transmission electron microscopy
英文摘要: 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 fluxclosures in PbTiO3/SrTiO3 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. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163411
Appears in Collections:气候变化与战略

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作者单位: Li, X., Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China, International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China, School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Tan, C., Department of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan, 411201, China, School ofMaterials Science and Engineering, Xiangtan University, Xiangtan, 411105, China; Liu, C., Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China; Gao, P., p-gao@pku.edu.cn, International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China, Collaborative Innovation Centre of Quantum Matter, Beijing, 100871, China, Electron Microscopy Laboratory, Peking University, Beijing, 100871, China; Sun, Y., International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China, Electron Microscopy Laboratory, Peking University, Beijing, 100871, China; Chen, P., Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China, School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Li, M., International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China, Electron Microscopy Laboratory, Peking University, Beijing, 100871, China; Liao, L., Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China, School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Zhu, R., International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China, Electron Microscopy Laboratory, Peking University, Beijing, 100871, China; Wang, J., School ofMaterials Science and Engineering, Xiangtan University, Xiangtan, 411105, China; Zhao, Y., Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China, School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Wang, L., Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China; Xu, Z., Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China, School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China, Songshan Lake Materials Laboratory, Dongguan, 523808, China; Liu, K., Collaborative Innovation Centre of Quantum Matter, Beijing, 100871, China, State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China; Zhong, X., xlzhong@xtu.edu.cn, School ofMaterials Science and Engineering, Xiangtan University, Xiangtan, 411105, China; Wang, J., jw@zju.edu.cn, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, China; Bai, X., xdbai@iphy.ac.cn, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China, School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China, Songshan Lake Materials Laboratory, Dongguan, 523808, China

Recommended Citation:
Li X.,Tan C.,Liu C.,et al. Atomic-scale observations of electrical and mechanical manipulation of topological polar flux closure[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(32)
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