Resilient and customized polar vortices through dislocation engineering

Abstract Topological structures in ferroelectrics, particularly vortices, have attracted attention for their potential in high-density data storage and advanced functional applications. Polar vortices are key to achieving properties like super-elasticity and negative capacitance, yet a reliable method to generate stable vortices in pure ferroelectric films remains elusive. In this study, we demonstrate that vortex-like structures can be induced around screw dislocations, which are inherently stable due to their associated strain fields. Strategically manipulating four screw dislocations, we predict and design a stable antivortex structure. This artificial antivortex exhibits unprecedented resilience, withstanding high electric fields and cyclic mechanical strain without significant switching. Our findings offer a feasible approach to generating customizable and resilient polarization patterns through dislocation engineering in conventional ferroelectrics, opening avenues for the design of advanced materials and devices.