Polar bubble domains are complex topological defects akin to magnetic skyrmions that can spontaneously form in ferroelectric thin films and superlattices. They can be deterministically written and deleted and exhibit a set of properties, such as sub-10 nm radius and room- temperature stability, that are highly attractive for dense data storage and recongurable nano-electronics technologies. However, possibilities of controlled motion of electric bubble skyrmions, a critical technology requirement currently remains missing. Here we present atomistic simulations that demonstrate how external electric-field perturbations can induce two types of motion of bubble skyrmions in low-dimensional tetragonal PbZr0.4Ti0.6O3 systems under residual depolarizing field.
About the speaker
Prof Laurent Bellaiche is a Scientific Associate Investigator at the University of Arkansas, where he leads first-principles-based theoretical studies of ferroelectrics, magnetic compounds, multiferroics and other semiconductors.
Within FLEET, Laurent works with Prof Nagy Valanoor in Research theme 1: topological materials, Research theme 2: exciton superfluids and Enabling technology A: atomically-thin materials, studying the properties of ferroelectric and ferromagnetic heterostructures, and novel topological oxides.