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Piezoelectricity in hafnia

Author

Listed:
  • Sangita Dutta

    (Luxembourg Institute of Science and Technology
    University of Luxembourg)

  • Pratyush Buragohain

    (University of Nebraska-Lincoln)

  • Sebastjan Glinsek

    (Luxembourg Institute of Science and Technology)

  • Claudia Richter

    (NaMLab gGmbH)

  • Hugo Aramberri

    (Luxembourg Institute of Science and Technology)

  • Haidong Lu

    (University of Nebraska-Lincoln)

  • Uwe Schroeder

    (NaMLab gGmbH)

  • Emmanuel Defay

    (Luxembourg Institute of Science and Technology)

  • Alexei Gruverman

    (University of Nebraska-Lincoln)

  • Jorge Íñiguez

    (Luxembourg Institute of Science and Technology
    University of Luxembourg)

Abstract

Because of its compatibility with semiconductor-based technologies, hafnia (HfO2) is today’s most promising ferroelectric material for applications in electronics. Yet, knowledge on the ferroic and electromechanical response properties of this all-important compound is still lacking. Interestingly, HfO2 has recently been predicted to display a negative longitudinal piezoelectric effect, which sets it apart from classic ferroelectrics (e.g., perovskite oxides like PbTiO3) and is reminiscent of the behavior of some organic compounds. The present work corroborates this behavior, by first-principles calculations and an experimental investigation of HfO2 thin films using piezoresponse force microscopy. Further, the simulations show how the chemical coordination of the active oxygen atoms is responsible for the negative longitudinal piezoelectric effect. Building on these insights, it is predicted that, by controlling the environment of such active oxygens (e.g., by means of an epitaxial strain), it is possible to change the sign of the piezoelectric response of the material.

Suggested Citation

  • Sangita Dutta & Pratyush Buragohain & Sebastjan Glinsek & Claudia Richter & Hugo Aramberri & Haidong Lu & Uwe Schroeder & Emmanuel Defay & Alexei Gruverman & Jorge Íñiguez, 2021. "Piezoelectricity in hafnia," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-27480-5
    DOI: 10.1038/s41467-021-27480-5
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    Cited by:

    1. Haidong Lu & Dong-Jik Kim & Hugo Aramberri & Marco Holzer & Pratyush Buragohain & Sangita Dutta & Uwe Schroeder & Veeresh Deshpande & Jorge Íñiguez & Alexei Gruverman & Catherine Dubourdieu, 2024. "Electrically induced cancellation and inversion of piezoelectricity in ferroelectric Hf0.5Zr0.5O2," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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