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

文献类型：期刊论文

作者You, Lu5,6; Zhang, Yang7; Zhou, Shuang5,8; Chaturvedi, Apoorva5; Morris, Samuel A.5; Liu, Fucai2,5; Chang, Lei5; Ichinose, Daichi3; Funakubo, Hiroshi3; Hu, Weijin1
刊名SCIENCE ADVANCES
出版日期2019-04-01
卷号5期号:4页码:9
ISSN号2375-2548
DOI10.1126/sciadv.aav3780
通讯作者Dong, Shuai(sdong@seu.edu.cn) ; Wang, Junling(jlwang@ntu.edu.sg)
英文摘要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
语种英语
出版者AMER ASSOC ADVANCEMENT SCIENCE
WOS记录号WOS:000466398400050
资助机构Ministry of Education, Singapore ; National Natural Science Foundation of China
源URL[http://ir.imr.ac.cn/handle/321006/133509]  
专题金属研究所_中国科学院金属研究所
通讯作者Dong, Shuai; Wang, Junling
作者单位1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, IMR, Shenyang 110016, Liaoning, Peoples R China
2.Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, Chengdu, Sichuan, Peoples R China
3.Tokyo Inst Technol, Sch Mat & Chem Technol, Dept Mat Sci & Engn, Yokohama, Kanagawa 2268502, Japan
4.Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
5.Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
6.Soochow Univ, Sch Phys Sci & Technol, 1 Shizi St, Suzhou 215006, Peoples R China
7.Southeast Univ, Sch Phys, Nanjing 211189, Jiangsu, Peoples R China
8.Nanjing Univ Posts & Telecommun, Sch Sci, Nanjing 210023, Jiangsu, Peoples R China
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.

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