ArticleNature materials2025
Electron ptychography reveals a ferroelectricity dominated by anion displacements.
Article in Nature materials, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Above Room Temperature Ferroelectricity in Epitaxially Strained KTaOAdvanced materials (Deerfield Beach, Fla.) · 2026Article
- Atomic-scale quantification of hydrogen in metal hydrides by electron ptychography.Science advances · 2026Article
- Room-temperature ferroelectricity in NaNbONature communications · 2026Article
- Atomic-Scale Imaging of Lithium Vacancies in a Battery Cathode by Multislice Electron Ptychography.Nano letters · 2026Article
- Revealing buried ferroelectric topologies by depth-resolved electron diffraction imaging.Nature communications · 2026Article
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- Direct observation of cation-dependent polarisation switching dynamics in fluorite ferroelectrics.Nature communications · 2026Article
- 3D atomic-scale metrology of strain relaxation and roughness in Gate-All-Around transistors via electron ptychography.Nature communications · 2026Article
- Coexisting Phases in NaNbOAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- Unveiling ferroelectric 3D microstructures.Nature materials · 2025Article
- Strain-induced lead-free morphotropic phase boundary.Nature communications · 2025Article
Corrections and comments
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Authors and funding
12 authors.
Funding
Abstract
Sodium niobate, a lead-free ferroic material, hosts delicately balanced, competing order parameters, including ferroelectric states that can be stabilized by epitaxial strain. Here we show that the resulting macroscopic ferroelectricity exhibits an unconventional microscopic structure using multislice electron ptychography. This technique overcomes multiple scattering artefacts limiting conventional electron microscopy, enabling both lateral spatial resolution beyond the diffraction limit and recovery of three-dimensional structural information. These imaging capabilities allow us to separate the ferroelectric interior of the sample from the relaxed surface structure and identify the soft phonon mode and related structural distortions with picometre precision. Unlike conventional ferroelectric perovskites, we find that the polar distortion in this material involves minimal distortions of the cation sublattices and is instead dominated by anion displacements relative to the niobium sublattice. We establish limits on film thickness for interfacial octahedral rotation engineering and directly visualize a random octahedral rotation pattern, arising from the flat dispersion of the associated phonon mode.
Identifiers
40269146What OpenQuestion holds
Registered trials
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