  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.
