DOI: 10.1073/pnas.1809004115
论文题名: Self-organization into ferroelectric and antiferroelectric crystals via the interplay between particle shape and dipolar interaction
作者: Takae K. ; Tanaka H.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2018
卷: 115, 期: 40 起始页码: 9917
结束页码: 9922
语种: 英语
英文关键词: Antiferroelectricity
; Dipolar crystal
; Ferroelectricity
; Mechanical switching
; Structural phase transition
Scopus关键词: article
; competition
; conformational transition
; crystal
; dipole
; frustration
; particle size
; phase transition
; polarization
英文摘要: Ferroelectricity and antiferroelectricity are widely seen in various types of condensed matter and are of technological significance not only due to their electrical switchability but also due to intriguing cross-coupling effects such as electro-mechanical and electro-caloric effects. The control of the two types of dipolar order has practically been made by changing the ionic radius of a constituent atom or externally applying strain for inorganic crystals and by changing the shape of a molecule for organic crystals. However, the basic physical principle behind such controllability involving crystal–lattice organization is still unknown. On the basis of a physical picture that a competition of dipolar order with another type of order is essential to understand this phenomenon, here we develop a simple model system composed of spheroid-like particles with a permanent dipole, which May capture an essence of this important structural transition in organic systems. In this model, we reveal that energetic frustration between the two types of anisotropic interactions, dipolar and steric interactions, is a key to control not only the phase transition but also the coupling between polarization and strain. Our finding provides a fundamental physical principle for self-organization to a crystal with desired dipolar order and realization of large electro-mechanical effects. © 2018 National Academy of Sciences. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163655
Appears in Collections: 气候变化与战略
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作者单位: Takae, K., Department of Fundamental Engineering, Institute of Industrial Science, University of Tokyo, Tokyo, 153-8505, Japan; Tanaka, H., Department of Fundamental Engineering, Institute of Industrial Science, University of Tokyo, Tokyo, 153-8505, Japan
Recommended Citation:
Takae K.,Tanaka H.. Self-organization into ferroelectric and antiferroelectric crystals via the interplay between particle shape and dipolar interaction[J]. Proceedings of the National Academy of Sciences of the United States of America,2018-01-01,115(40)