Dimensionality-induced change in topological order in multiferroic oxide superlattices

Abstract

We construct ferroelectric (LuFeO3)m/(LuFe2O4) superlattices with varying index m to study the effect of confinement on topological defects. We observe a thickness-dependent transition from neutral to charged domain walls and the emergence of fractional vortices. In thin LuFeO3 layers, the volume fraction of domain walls grows, lowering the symmetry from P63cm to P3c1 before reaching the non-polar P63/mmc state, analogous to the high-temperature ferroelectric to paraelectric transition. Our study shows how dimensional confinement stabilizes textures beyond those in bulk ferroelectric systems.

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Cited by in corpus (4)

• Epitaxy of hexagonal ABO${}_3$ quantum materials
• Magnetoelectric coupling and decoupling in multiferroic hexagonal YbFeO3 thin films
• Recent Progress on Multiferroic Hexagonal Rare-Earth Ferrites (h-RFeO3, R = Y,Dy-Lu)
• Strong tunability of epitaxial relationship and reconstruction at improper ferroelectric interface