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Enhanced polarization and abnormal flexural deformation in bent freestanding perovskite oxides

Author

Listed:
  • Songhua Cai

    (The Hong Kong Polytechnic University)

  • Yingzhuo Lun

    (Beijing Institute of Technology)

  • Dianxiang Ji

    (The Hong Kong Polytechnic University)

  • Peng Lv

    (Beijing Institute of Technology)

  • Lu Han

    (Nanjing University)

  • Changqing Guo

    (Beijing Institute of Technology)

  • Yipeng Zang

    (Nanjing University)

  • Si Gao

    (Nanjing University)

  • Yifan Wei

    (Nanjing University)

  • Min Gu

    (Nanjing University)

  • Chunchen Zhang

    (Nanjing University)

  • Zhengbin Gu

    (Nanjing University)

  • Xueyun Wang

    (Beijing Institute of Technology)

  • Christopher Addiego

    (University of California)

  • Daining Fang

    (Beijing Institute of Technology
    Peking University)

  • Yuefeng Nie

    (Nanjing University)

  • Jiawang Hong

    (Beijing Institute of Technology)

  • Peng Wang

    (University of Warwick)

  • Xiaoqing Pan

    (University of California
    University of California
    University of California)

Abstract

Recent realizations of ultrathin freestanding perovskite oxides offer a unique platform to probe novel properties in two-dimensional oxides. Here, we observe a giant flexoelectric response in freestanding BiFeO3 and SrTiO3 in their bent state arising from strain gradients up to 3.5 × 107 m−1, suggesting a promising approach for realizing ultra-large polarizations. Additionally, a substantial change in membrane thickness is discovered in bent freestanding BiFeO3, which implies an unusual bending-expansion/shrinkage effect in the ferroelectric membrane that has never been seen before in crystalline materials. Our theoretical model reveals that this unprecedented flexural deformation within the membrane is attributable to a flexoelectricity–piezoelectricity interplay. The finding unveils intriguing nanoscale electromechanical properties and provides guidance for their practical applications in flexible nanoelectromechanical systems.

Suggested Citation

  • Songhua Cai & Yingzhuo Lun & Dianxiang Ji & Peng Lv & Lu Han & Changqing Guo & Yipeng Zang & Si Gao & Yifan Wei & Min Gu & Chunchen Zhang & Zhengbin Gu & Xueyun Wang & Christopher Addiego & Daining Fa, 2022. "Enhanced polarization and abnormal flexural deformation in bent freestanding perovskite oxides," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32519-2
    DOI: 10.1038/s41467-022-32519-2
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    References listed on IDEAS

    as
    1. Y. L. Tang & Y. L. Zhu & Y. Liu & Y. J. Wang & X. L. Ma, 2017. "Giant linear strain gradient with extremely low elastic energy in a perovskite nanostructure array," Nature Communications, Nature, vol. 8(1), pages 1-8, December.
    2. Bei Zhao & Zhong Wan & Yuan Liu & Junqing Xu & Xiangdong Yang & Dingyi Shen & Zucheng Zhang & Chunhao Guo & Qi Qian & Jia Li & Ruixia Wu & Zhaoyang Lin & Xingxu Yan & Bailing Li & Zhengwei Zhang & Hui, 2021. "High-order superlattices by rolling up van der Waals heterostructures," Nature, Nature, vol. 591(7850), pages 385-390, March.
    3. Lu Han & Christopher Addiego & Sergei Prokhorenko & Meiyu Wang & Hanyu Fu & Yousra Nahas & Xingxu Yan & Songhua Cai & Tianqi Wei & Yanhan Fang & Huazhan Liu & Dianxiang Ji & Wei Guo & Zhengbin Gu & Yu, 2022. "High-density switchable skyrmion-like polar nanodomains integrated on silicon," Nature, Nature, vol. 603(7899), pages 63-67, March.
    4. Dianxiang Ji & Songhua Cai & Tula R. Paudel & Haoying Sun & Chunchen Zhang & Lu Han & Yifan Wei & Yipeng Zang & Min Gu & Yi Zhang & Wenpei Gao & Huaixun Huyan & Wei Guo & Di Wu & Zhengbin Gu & Evgeny , 2019. "Freestanding crystalline oxide perovskites down to the monolayer limit," Nature, Nature, vol. 570(7759), pages 87-90, June.
    5. W. Eerenstein & N. D. Mathur & J. F. Scott, 2006. "Multiferroic and magnetoelectric materials," Nature, Nature, vol. 442(7104), pages 759-765, August.
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