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Bakaul SR, Prokhorenko S, Zhang Q, Nahas Y, Hu Y, Petford-Long A, Bellaiche L, Valanoor N. Freestanding Ferroelectric Bubble Domains. Adv Mater 2021; 33:e2105432. [PMID: 34541726 DOI: 10.1002/adma.202105432] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/17/2021] [Indexed: 06/13/2023]
Abstract
Bubble-like domains, typically a precursor to the electrical skyrmions, arise in ultrathin complex oxide ferroelectric-dielectric-ferroelectric heterostructures epitaxially clamped with flat substrates. Here, it is reported that these specially ordered electric dipoles can also be retained in a freestanding state despite the presence of inhomogeneously distributed structural ripples. By probing local piezo and capacitive responses and using atomistic simulations, this study analyzes these ripples, sheds light on how the bubbles are stabilized in the modified electromechanical energy landscape, and discusses the difference in morphology between bubbles in freestanding and as-grown states. These results are anticipated to be the starting point of a new paradigm for the exploration of electric skyrmions with arbitrary boundaries and physically flexible topological orders in ferroelectric curvilinear space.
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Affiliation(s)
- Saidur R Bakaul
- Materials Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Sergei Prokhorenko
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Qi Zhang
- School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales, 2052, Australia
| | - Yousra Nahas
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Yushi Hu
- Department of Computer Science, University of Chicago, 5730 S Ellis Ave, Chicago, IL, 60637, USA
| | - Amanda Petford-Long
- Materials Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Laurent Bellaiche
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Nagarajan Valanoor
- School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales, 2052, Australia
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