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Continuously controllable photoconductance in freestanding BiFeO3 by the macroscopic flexoelectric effect

Author

Listed:
  • Rui Guo

    (Department of Materials Science and Engineering, National University of Singapore
    College of Electron and Information Engineering, Hebei University)

  • Lu You

    (Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University)

  • Weinan Lin

    (Department of Materials Science and Engineering, National University of Singapore)

  • Amr Abdelsamie

    (Department of Materials Science and Engineering, Nanyang Technological University)

  • Xinyu Shu

    (Department of Materials Science and Engineering, National University of Singapore)

  • Guowei Zhou

    (Department of Materials Science and Engineering, National University of Singapore)

  • Shaohai Chen

    (Department of Materials Science and Engineering, National University of Singapore)

  • Liang Liu

    (Department of Materials Science and Engineering, National University of Singapore)

  • Xiaobing Yan

    (College of Electron and Information Engineering, Hebei University)

  • Junling Wang

    (Department of Materials Science and Engineering, Nanyang Technological University
    Department of Physics, Southern University of Science and Technology)

  • Jingsheng Chen

    (Department of Materials Science and Engineering, National University of Singapore)

Abstract

Flexoelectricity induced by the strain gradient is attracting much attention due to its potential applications in electronic devices. Here, by combining a tunable flexoelectric effect and the ferroelectric photovoltaic effect, we demonstrate the continuous tunability of photoconductance in BiFeO3 films. The BiFeO3 film epitaxially grown on SrTiO3 is transferred to a flexible substrate by dissolving a sacrificing layer. The tunable flexoelectricity is achieved by bending the flexible substrate which induces a nonuniform lattice distortion in BiFeO3 and thus influences the inversion asymmetry of the film. Multilevel conductance is thus realized through the coupling between flexoelectric and ferroelectric photovoltaic effect in freestanding BiFeO3. The strain gradient induced multilevel photoconductance shows very good reproducibility by bending the flexible BiFeO3 device. This control strategy offers an alternative degree of freedom to tailor the physical properties of flexible devices and thus provides a compelling toolbox for flexible materials in a wide range of applications.

Suggested Citation

  • Rui Guo & Lu You & Weinan Lin & Amr Abdelsamie & Xinyu Shu & Guowei Zhou & Shaohai Chen & Liang Liu & Xiaobing Yan & Junling Wang & Jingsheng Chen, 2020. "Continuously controllable photoconductance in freestanding BiFeO3 by the macroscopic flexoelectric effect," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16465-5
    DOI: 10.1038/s41467-020-16465-5
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    Cited by:

    1. Zhuohui Liu & Qinghua Zhang & Donggang Xie & Mingzhen Zhang & Xinyan Li & Hai Zhong & Ge Li & Meng He & Dashan Shang & Can Wang & Lin Gu & Guozhen Yang & Kuijuan Jin & Chen Ge, 2023. "Interface-type tunable oxygen ion dynamics for physical reservoir computing," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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