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research article

Induced giant piezoelectricity in centrosymmetric oxides

Park, D.-S.
•
Hadad, M.  
•
Riemer, L. M.  
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February 11, 2022
Science

Piezoelectrics are materials that linearly deform in response to an applied electric field. As a fundamental prerequisite, piezoelectric materials must have a noncentrosymmetric crystal structure. For more than a century, this has remained a major obstacle for finding piezoelectric materials. We circumvented this limitation by breaking the crystallographic symmetry and inducing large and sustainable piezoelectric effects in centrosymmetric materials by the electric field–induced rearrangement of oxygen vacancies. Our results show the generation of extraordinarily large piezoelectric responses [with piezoelectric strain coefficients (d33) of ~200,000 picometers per volt at millihertz frequencies] in cubic fluorite gadolinium-doped CeO2−x films, which are two orders of magnitude larger than the responses observed in the presently best-known lead-based piezoelectric relaxor–ferroelectric oxide at kilohertz frequencies. These findings provide opportunities to design piezoelectric materials from environmentally friendly centrosymmetric ones.

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Type
research article
DOI
10.1126/science.abm7497
Author(s)
Park, D.-S.
Hadad, M.  
Riemer, L. M.  
Ignatans, R.
Spirito, D.
Esposito, V.
Tileli, V.
Gauquelin, N.
Chezganov, D.
Jannis, D.
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Date Issued

2022-02-11

Publisher

American Association for the Advancement of Science

Published in
Science
Volume

375

Issue

6581

Start page

653

End page

657

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SCI-STI-DD  
Available on Infoscience
February 10, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/185266
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