Brownian electric bubble quasiparticles

TL;DR

This paper demonstrates through atomistic simulations that electric bubbles exhibit quasiparticle behavior, including Brownian motion and tunable diffusion, establishing their potential for applications similar to magnetic skyrmions.

Contribution

It provides the first evidence of Brownian motion and quasiparticle properties of electric bubbles, expanding their potential for physical effects and applications.

Findings

Electric bubbles can have long lifetimes (~ns) despite small size (<2 nm).

They exhibit stochastic, Brownian-like motion with tunable diffusion constants.

The study confirms their quasiparticle nature, similar to magnetic skyrmions.

Abstract

Recent works on electric bubbles (including the experimental demonstration of electric skyrmions) constitute a breakthrough akin to the discovery of magnetic skyrmions some 15 years ago. So far research has focused on obtaining and visualizing these objects, which often appear to be immobile (pinned) in experiments. Thus, critical aspects of magnetic skyrmions - e.g., their quasiparticle nature, Brownian motion - remain unexplored (unproven) for electric bubbles. Here we use predictive atomistic simulations to investigate the basic dynamical properties of these objects in pinning-free model systems. We show that it is possible to find regimes where the electric bubbles can present long lifetimes ($\sim$ ns) despite being relatively small ($\varnothing <$ 2 nm). Additionally, we find that they can display stochastic dynamics with large and highly tunable diffusion constants. We thus establish the quasiparticle nature of electric bubbles and put them forward for the physical effects and applications (e.g., in token-based Probabilistic Computing) considered for magnetic skyrmions.