A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State

doi:10.1002/adfm.201901687

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	A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State
	Tang, Yunlong 3; Zhu, Yinlian 3; Ma, Xiuliang 3,4; Hong, Zijian 5; Wang, Yujia 3; Wang, Wenyuan 3; Xu, Yaobin 3; Liu, Ying 3; Wu, Bo 3; Chen, Lang 5,6
刊名	ADVANCED FUNCTIONAL MATERIALS
	2019-08-01
卷号	29 期号:35 页码:10
关键词	[111] perovskite film ferroelectric monoclinic Poisson's ratio strain engineering
ISSN号	1616-301X
DOI	10.1002/adfm.201901687
通讯作者	Ma, Xiuliang(xlma@imr.ac.cn) ; Pennycook, Stephen J.(steve.pennycook@nus.edu.sg)
英文摘要	[111]-Oriented perovskite oxide films exhibit unique interfacial and symmetry breaking effects, which are promising for novel quantum materials as topological insulators and polar metals. However, due to strong polar mismatch and complex structural reconstructions on (111) surfaces/interfaces, it is still challenging to grow high quality [111] perovskite heterostructures, let alone explore the as-resultant physical properties. Here, the fabrication of ultrathin PbTiO3 films grown on a SrTiO3(111) substrate with atomically defined surfaces, by pulsed laser deposition, is reported. High-resolution scanning transmission electron microscopy and X-ray diffraction reveal that the as-grown [111]PbTiO3 films are coherent with the substrate and compressively strained along all in-plane directions. In contrast, the out-of-plane lattices are almost unchanged compared with that of bulk PbTiO3, resulting in a 4% contraction in unit cell volume and a nearly zero Poisson's ratio. Ferroelectric displacement mapping reveals a monoclinic distortion within the compressed [111]PbTiO3, with a polarization larger than 50 mu C cm(-2). The present findings, as further corroborated by phase field simulations and first principle calculations, differ significantly from the common [001]-oriented films. Fabricating oxide films through [111] epitaxy may facilitate the formation of new phase components and exploration of novel physical properties for future electronic nanodevices.
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000484382300003
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/135297]
专题	金属研究所_中国科学院金属研究所
通讯作者	Ma, Xiuliang; Pennycook, Stephen J.
作者单位	1.Shenzhen Univ, Sch Mat Sci & Engn, Shenzhen 518060, Peoples R China 2.Harbin Inst Technol, Sch Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Liaoning, Peoples R China 4.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China 5.Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA 6.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China 7.Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117576, Singapore
推荐引用方式 GB/T 7714	Tang, Yunlong,Zhu, Yinlian,Ma, Xiuliang,et al. A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State[J]. ADVANCED FUNCTIONAL MATERIALS,2019,29(35):10.
APA	Tang, Yunlong.,Zhu, Yinlian.,Ma, Xiuliang.,Hong, Zijian.,Wang, Yujia.,...&Pennycook, Stephen J..(2019).A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State.ADVANCED FUNCTIONAL MATERIALS,29(35),10.
MLA	Tang, Yunlong,et al."A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State".ADVANCED FUNCTIONAL MATERIALS 29.35(2019):10.