Summary

A team at HZB has, for the first time, reported polar vortices in (BaTiO₃/SrTiO₃)₁₀ superlattices on silicon. These results expand the range of materials and substrates on which polar topological textures can occur and open up new options for incorporating complex ferroelectric states into silicon-based technologies. Polar textures such as vortices have so far been observed almost exclusively in lead-containing superlattices comprising ultrathin ferroelectric and dielectric titanate layers on oxide substrates.

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