Chiral polarization textures induced by the flexoelectric effect in ferroelectric nanocylinders

Polar chiral structures have recently attracted much interest within the scientific community, as they pave way towards innovative device concepts similar to developments achieved in nanomagnetism. Despite growing interest, many fundamental questions related mechanisms controlling appearance and stability of ferroelectric topological remain open. In this context, nanoparticles provide a flexible playground for such investigations. Here, we present theoretical study polar textures cylindrical core-shell nanoparticle. The calculations reveal polarization structure containing two oppositely oriented diffuse axial domains located near cylinder ends, separated by region with zero-axial polarization. We name configuration "flexon" underline flexoelectric nature its Analytical numerical simulation results show that flexon's chirality can be switched reversing sign coefficient. Furthermore, anisotropy coupling is found critically influence texture domain morphology. flexon rounded shape, combined distinct properties localization surface, are reminiscent Chiral Bobber magnetism. azimuthal plane, displays state vortex an axially polarized core region, i.e., meron. effect, which couples electric elastic strain gradients, plays determining role stabilization these states. discuss similarities between interaction predicted Dyzaloshinskii-Moriya leading