Polar textures in multiferroic BiFeO 3 -based superlattices

Recently, ferroelectric-based superlattices (SLs) have emerged and leaded to the discovery of exotic polar textures such as skyrmionic states or vortices in PbTiO 3 /SrTiO 3 SLs [1,2]. Thus, SLs offer a unique and promising new platform to study these novel polar states which result mainly from the effects of strain, confinement, and competing interactions between the degrees of freedom (polar displacements, oxygen tilts) of these perovskite layers.