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Spinons, or fractionalized collective excitations, have been reported in 1D systems but are debated in higher dimensions. Here the authors show that a heterostructure-based approach induces liquid-like spin dynamics in a 2D Heisenberg antiferromagnet, with isotropic continuum excitations extending to low energies.

Scaling effects on ferroelectric domains could impact applications for next-generation miniaturized devices. Here brownmillerite oxides are shown to demonstrate ferroelectric domains with widths down to the sub-unit-cell level.

Metallic van der Waals magnets have considerable technological promise, due to their ability to be strongly coupled with electronic currents and integrated in two dimensional heterostructures. Here, Seo et al. demonstrate highly tunable itinerant antiferromagnetism in a van der Waals magnet.

The triple point is a well-known feature on pressure–temperature phase diagrams. A multiferroic triple point is now reported for La-doped BiFeO₃; La concentration and temperature are the phase variables and the phases display different spin (dis)order.

Unrestricted integration of single-crystal oxide films on Si substrates allows for exploitation of emerging functionality of new materials in mature silicon devices. Here the authors integrate epitaxial oxide films with sharp metal-insulator transition on Si substrates by epitaxial lift-off of a freestanding nanomembrane.

The research to utilize chemical potential mismatch for materials synthesis has been limited across the oxide interface. Here, the authors show that directional ionic transport from the VO₂ layers stabilizes the rutile TiO₂ phase at extremely low temperatures, at which epitaxy is difficult, by effectively lowering the activation barrier for crystallization.

Exploring topological textures in ferroelectrics facilitates the understanding and application of topological features in matter. Here the authors demonstrate the strain field induced evolution of topological vortices in nanoplatelets of rhombohedral phase BiFeO3 using the angle-resolved piezoresponse force microscopy.

Observation of a strain-gradient-induced piezoresponse at domain walls remains a challenge. Here, the authors find the piezoelectric response to be enhanced in the ferroelastic domain walls of centrosymmetric tungsten trioxide thin films due to a large strain gradient over a wide width of the wall.

Spinodal decomposition, spontaneous phase separation process for periodic lamellae at the nanometer scale, of correlated oxides (Ti, V)O₂ systems offers a sophisticated route to achieve new class of mesoscale structure in the form of self-assembled superlattices. Here, we achieve the tunable self-assembly of (Ti, V)O₂ superlattices with steep metal-insulator transition (ΔT_MI < 5 K) by spinodal decomposition with accurate control of growth parameters. Increase in a film growth rate thickens a lamellae period; the phase separation were kinetically enhanced by adatom impingement during two-dimensional growth, demonstrating that interplay between mass transport and uphill diffusion yields highly periodic (Ti, V)O₂ superlattices.