Observation of a stable fractionalized polar skyrmionlike texture with giant piezoelectric response enhancement

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We report the creation of stable fractionalized polar skyrmionlike structures via flexoelectric effect in a prototypical multiferroic BiFeO3 thin film, which are directly imaged by angle-resolved piezoresponse force microscopy technique. We also demonstrate an approach to enhance piezoresponse at the nanoscale. Phase-field simulations reveal that a tip-driven flexoelectric effect allows the formation of an ordered polar skyrmionlike configuration that is topologically protected by the converse flexoelectric effect. Our findings open up avenues for designing and controlling spatially localized topological textures in rhombohedral ferroelectrics, and also could contribute to future developments for ferroelectric-based nanoelectronic devices.
Publisher
AMER PHYSICAL SOC
Issue Date
2020-12
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW B, v.102, no.21

ISSN
2469-9950
DOI
10.1103/PhysRevB.102.214112
URI
http://hdl.handle.net/10203/280057
Appears in Collection
PH-Journal Papers(저널논문)
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