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

2019-08

10.1002/adfm.201901687

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

[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.

[111] perovskite film ferroelectric monoclinic Poisson's ratio strain engineering

SCI ; EI

英语

NI期刊

其他

Youth Innovation Promotion Association of the Chinese Academy of Sciences[2016177] ; National Basic Research Program of China (973 Program)[2014CB921002] ; [QYZDJ-SSW-JSC010] ; National Natural Science Foundation of China[51671194]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000484382300003

WILEY-V C H VERLAG GMBH

20192607106957

Ferroelectric materials ; Ferroelectricity ; High resolution transmission electron microscopy ; Lead titanate ; Perovskite ; Poisson ratio ; Pulsed laser deposition ; Scanning electron microscopy ; Strontium titanates ; Substrates ; Ultrathin films

Minerals:482.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Dielectric Materials:708.1 ; Optical Devices and Systems:741.3 ; Laser Applications:744.9 ; Chemical Products Generally:804 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.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

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).

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).

Tang, Yunlong,et al."A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State".ADVANCED FUNCTIONAL MATERIALS 29.35(2019).