Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric

doi:10.1126/sciadv.aav3780

IMR OpenIR

	Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric
	You, Lu 1,2; Zhang, Yang 3; Zhou, Shuang 1,4; Chaturvedi, Apoorva 1; Morris, Samuel A.1; Liu, Fucai 1,5; Chang, Lei 1; Ichinose, Daichi 6; Funakubo, Hiroshi 6; Hu, Weijin 7; Wu, Tom 8; Liu, Zheng 1; Dong, Shuai 3; Wang, Junling 1
通讯作者	Dong, Shuai(sdong@seu.edu.cn) ; Wang, Junling(jlwang@ntu.edu.sg)
	2019-04-01
发表期刊	SCIENCE ADVANCES
ISSN	2375-2548
卷号	5 期号:4 页码:9
摘要	Recent research on piezoelectric materials is predominantly devoted to enhancing the piezoelectric coefficient, but overlooks its sign, largely because almost all of them exhibit positive longitudinal piezoelectricity. The only experimentally known exception is ferroelectric polymer poly(vinylidene fluoride) and its copolymers, which condense via weak van der Waals (vdW) interaction and show negative piezoelectricity. Here we report quantitative determination of giant intrinsic negative longitudinal piezoelectricity and electrostriction in another class of vdW solids-two-dimensional (2D) layered ferroelectric CuInP2S6. With the help of single crystal x-ray crystallography and density-functional theory calculations, we unravel the atomistic origin of negative piezoelectricity in this system, which arises from the large displacive instability of Cu ions coupled with its reduced lattice dimensionality. Furthermore, the sizable piezoelectric response and negligible substrate clamping effect of the 2D vdW piezoelectric materials warrant their great potential in nanoscale, flexible electromechanical devices.
资助者	Ministry of Education, Singapore ; National Natural Science Foundation of China
DOI	10.1126/sciadv.aav3780
收录类别	SCI
语种	英语
资助项目	Ministry of Education, Singapore[AcRF Tier 1 RG99/16] ; Ministry of Education, Singapore[AcRF Tier 1 RG118/17] ; National Natural Science Foundation of China[11834002]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000466398400050
出版者	AMER ASSOC ADVANCEMENT SCIENCE
引用统计	被引频次：218[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/133510
专题	中国科学院金属研究所
通讯作者	Dong, Shuai; Wang, Junling
作者单位	1.Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore 2.Soochow Univ, Sch Phys Sci & Technol, 1 Shizi St, Suzhou 215006, Peoples R China 3.Southeast Univ, Sch Phys, Nanjing 211189, Jiangsu, Peoples R China 4.Nanjing Univ Posts & Telecommun, Sch Sci, Nanjing 210023, Jiangsu, Peoples R China 5.Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, Chengdu, Sichuan, Peoples R China 6.Tokyo Inst Technol, Sch Mat & Chem Technol, Dept Mat Sci & Engn, Yokohama, Kanagawa 2268502, Japan 7.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, IMR, Shenyang 110016, Liaoning, Peoples R China 8.Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
推荐引用方式 GB/T 7714	You, Lu,Zhang, Yang,Zhou, Shuang,et al. Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric[J]. SCIENCE ADVANCES,2019,5(4):9.
APA	You, Lu.,Zhang, Yang.,Zhou, Shuang.,Chaturvedi, Apoorva.,Morris, Samuel A..,...&Wang, Junling.(2019).Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric.SCIENCE ADVANCES,5(4),9.
MLA	You, Lu,et al."Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric".SCIENCE ADVANCES 5.4(2019):9.