Melting of Polarization Vortices Crystals and Chiral Phase Transitions in Oxide Superlattices

Fernando Gómez-Ortiz, Pablo García-Fernández, Juan M. López +1

We study the equilibrium arrangements of polarization vortices in (PbTiO${}_3$)${}_n$/(SrTiO${}_3$)${}_n$ superlattices by means of second-principles simulations. We find that, at low temp…