Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session B38: Ferroelectric Oxide Heterostructures and Freestanding Membranes
11:30 AM–2:30 PM,
Monday, March 6, 2023
Room: Room 230
Sponsoring
Unit:
DMP
Chair: Seung Sae Hong, University of California, Davis
Abstract: B38.00001 : Manipulating polar structures in freestanding antiferroelectric and ferroelectric membranes*
11:30 AM–12:06 PM
Presenter:
David Pesquera Herrero
(Catalan Institute of Nanoscience and Nanotechnology)
Author:
David Pesquera Herrero
(Catalan Institute of Nanoscience and Nanotechnology)
In this talk I will show recent progress on the synthesis and manipulation of polar ordering in ferroelectric and antiferroelectric nanomembranes and capacitors, fabricated after releasing epitaxial heterostructures grown on compatible oxide substrates. The consequences of the release from the substrate clamping on the polarization switching dynamics and energetics will be discussed for BaTiO3 ferroelectric capacitors (3, 4), as well as for antiferroelectric PbZrO3 capacitors, transferred to silicon. Freed from the mechanical constraints from the substrate, the freestanding membranes are susceptible to internal and external strains that allow manipulating their functional responses. In this regard, I will discuss the effect of interlayer stresses and substrate bending for the macroscopic control of electrical properties, and the impact of local strains at spontaneously occurring folding patterns in the membranes, favoring the emergence of complex domain patterns and functional domain walls.
1. A. Fernandez, et al., Adv. Mater. 34, 2108841 (2022).
2. D. Pesquera, et al.. J. Phys. Condens. Matter. 34, 383001 (2022).
3. D. Pesquera, et al.. Adv. Mater. 32, 2003780 (2020).
*Funding from 'la Caixa' Foundation fellowship (ID 100010434) is acknowledged.
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