A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State
Tang, Yunlong1; Zhu, Yinlian1; Ma, Xiuliang1,2; Hong, Zijian3; Wang, Yujia1; Wang, Wenyuan1; Xu, Yaobin1; Liu, Ying1; Wu, Bo1; Chen, Lang3,4; Huang, Chuanwei5; Chen, Longqing3,4; Chen, Zuhuang6; Wu, Haijun7; Pennycook, Stephen J.7
Corresponding AuthorMa, Xiuliang( ; Pennycook, Stephen J.(
Abstract[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.
Keyword[111] perovskite film ferroelectric monoclinic Poisson's ratio strain engineering
Indexed BySCI
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000484382300003
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Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorMa, Xiuliang; Pennycook, Stephen J.
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Liaoning, Peoples R China
2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China
3.Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
4.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China
5.Shenzhen Univ, Sch Mat Sci & Engn, Shenzhen 518060, Peoples R China
6.Harbin Inst Technol, Sch Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
7.Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117576, Singapore
Recommended Citation
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.
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