Periodic polar vortices in BaTiO(3)/SrTiO(3) superlattices monolithically grown on silicon.

Vortex tubes in BaTiO3/SrTiO3 superlattices on silicon are stabilized, forming a ground state with in-plane 90-degree stripe patterns, confirmed by phase field modeling.

• Why it matters: Understanding and controlling polar textures in ferroelectric materials on silicon is crucial for integrating complex ferroelectric states into existing semiconductor technologies, addressing a significant materials compatibility gap.
• What they did: The study used epitaxial growth of BaTiO3/SrTiO3 superlattices on silicon, combined with phase field modeling and temperature-dependent X-ray diffraction, to demonstrate the formation of vortex structures.
• The result: This work broadens the range of materials and substrates capable of hosting topological polar textures, enabling new avenues for ferroelectric device integration with silicon-based electronics.