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

Yunlong Tang, Yinlian Zhu, Xiuliang Ma, Zijian Hong, Yujia Wang, Wenyuan Wang, Yaobin Xu, Ying Liu, Bo Wu, Lang Chen, Chuanwei Huang, Long-qing Chen, Zuhuang Chen, Haijun Wu, Stephen J. Pennycook

Research output: Contribution to journalArticle

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 µC 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.

Original languageEnglish (US)
Article number1901687
JournalAdvanced Functional Materials
Volume29
Issue number35
DOIs
StatePublished - Jan 1 2019

Fingerprint

Poisson ratio
Perovskite
Oxide films
Physical properties
oxide films
Ultrathin films
Substrates
Pulsed laser deposition
physical properties
Epitaxial growth
Ferroelectric materials
Heterojunctions
Metals
Polarization
Transmission electron microscopy
Fabrication
X ray diffraction
epitaxy
Scanning electron microscopy
contraction

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry

Cite this

Tang, Y., Zhu, Y., Ma, X., Hong, Z., Wang, Y., Wang, W., ... Pennycook, S. J. (2019). A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State. Advanced Functional Materials, 29(35), [1901687]. https://doi.org/10.1002/adfm.201901687
Tang, Yunlong ; Zhu, Yinlian ; Ma, Xiuliang ; Hong, Zijian ; Wang, Yujia ; Wang, Wenyuan ; Xu, Yaobin ; Liu, Ying ; Wu, Bo ; Chen, Lang ; Huang, Chuanwei ; Chen, Long-qing ; Chen, Zuhuang ; Wu, Haijun ; Pennycook, Stephen J. / A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State. In: Advanced Functional Materials. 2019 ; Vol. 29, No. 35.
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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 µC 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.",
author = "Yunlong Tang and Yinlian Zhu and Xiuliang Ma and Zijian Hong and Yujia Wang and Wenyuan Wang and Yaobin Xu and Ying Liu and Bo Wu and Lang Chen and Chuanwei Huang and Long-qing Chen and Zuhuang Chen and Haijun Wu and Pennycook, {Stephen J.}",
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Tang, Y, Zhu, Y, Ma, X, Hong, Z, Wang, Y, Wang, W, Xu, Y, Liu, Y, Wu, B, Chen, L, Huang, C, Chen, L, Chen, Z, Wu, H & Pennycook, SJ 2019, 'A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State', Advanced Functional Materials, vol. 29, no. 35, 1901687. https://doi.org/10.1002/adfm.201901687

A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State. / Tang, Yunlong; Zhu, Yinlian; Ma, Xiuliang; Hong, Zijian; Wang, Yujia; Wang, Wenyuan; Xu, Yaobin; Liu, Ying; Wu, Bo; Chen, Lang; Huang, Chuanwei; Chen, Long-qing; Chen, Zuhuang; Wu, Haijun; Pennycook, Stephen J.

In: Advanced Functional Materials, Vol. 29, No. 35, 1901687, 01.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State

AU - Tang, Yunlong

AU - Zhu, Yinlian

AU - Ma, Xiuliang

AU - Hong, Zijian

AU - Wang, Yujia

AU - Wang, Wenyuan

AU - Xu, Yaobin

AU - Liu, Ying

AU - Wu, Bo

AU - Chen, Lang

AU - Huang, Chuanwei

AU - Chen, Long-qing

AU - Chen, Zuhuang

AU - Wu, Haijun

AU - Pennycook, Stephen J.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - [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 µC 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.

AB - [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 µC 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.

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