Researchers have developed a new method for building large-area twisted oxide materials while precisely controlling how their atomic layers are aligned.
The breakthrough, led by scientists at North Carolina State University, could help move twistronics from small-scale laboratory experiments toward practical electronic devices.
Twistronics is a field that studies how rotating one thin material layer relative to another can change the materialโs electronic, optical, or physical behavior. Until now, most twistronics research has focused on two-dimensional materials held together by weak van der Waals forces.
In this new work, the researchers showed that oxide materials, which are connected by much stronger chemical bonds, can also be twisted with controlled precision. This opens the door to new kinds of interfacial behavior and device design.
To demonstrate the technique, the team worked with crystalline sodium niobate membranes. They first created large-area oxide membranes and added tiny reference markers around their edges using photolithography.
One membrane was then lifted and carefully placed on top of another. By watching how the reference markers aligned, the researchers could set the rotation angle between the two layers with precision.
After positioning the layers, the team used a specially designed annealing process to form strong chemical bonds between them. This created a stable twisted oxide structure.
The ability to make these materials over large areas is important because practical devices require scalable fabrication methods. Since the membranes can also be transferred onto different surfaces, the approach could support future oxide-based electronic platforms.
The researchers used synchrotron X-ray diffraction to study the interface between the two layers. They found that the bonding was strong enough to distort the atomic structure of the material.
Instead of simply stacking one layer on another, the twist caused a gradual rotation of the atomic lattice at the interface. The team also observed changes in the materialโs phase structure and domain configuration.
These internal changes may affect how the material behaves electronically, although further research is needed to fully understand the resulting properties.
The study used sodium niobate as a model system, but the researchers believe the method could be applied to other complex oxide materials. This could give scientists a new way to engineer materials with custom functions by controlling twist angles and interfacial bonding.
Because oxide materials are already important in electronics, energy systems, sensors, and functional devices, the ability to twist and bond them at large scale could create new opportunities for advanced technologies.
The work suggests that strong chemical bonding, rather than being a limitation, may allow scientists to reshape matter from within and explore new forms of oxide twistronics.
By combining atomic-level control with scalable fabrication, the technique offers a promising route for designing next-generation electronic materials with tailored properties.
Journal Reference:
Ghanbari, R., Rodrigues, E., Kim, Y.-H., Koons, K., Li, Y., Lebogang, K., Ding, Y., Barefoot, D. W., Wang, Y., Liu, Y., Zhou, H., Chi, M., & Xu, R. (2026). Deterministic Fabrication of Large-Area, High-Crystallinity Oxide Moirรฉ Superlattices. ACS Nano, 20(29), 20647. https://doi.org/10.1021/acsnano.6c04794