Regensburg 2025 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 8: (Multi)ferroic States: From Fundamentals to Applications (III)

KFM 8.1: Hauptvortrag

Dienstag, 18. März 2025, 09:30–10:00, H9

Ferrolectric bubble currents — •Hugo Aramberri — Luxembourg Institute of Science and Technology

Frustrated ferroelectrics can display complex dipole textures displaying rich physical phenomena. In ferroelectric/paraelectric superlattices, built-in or applied electric fields can result in bubble domains of nanometric size akin to magnetic skyrmions.

Our atomistic calculations predict these bubbles to be quasiparticles that display thermally activated Brownian motion, enabling the conceptualization of some of the all-electric unconventional computing schemes that have already been developed for their magnetic counterparts.

However, control over the bubble motion, which is key for many potential technological applications, is still essentially lacking. In this talk I will present our latest ideas to induce bubble currents. Our simulations indicate that bubbles can be accelerated up to at least 50 m/s in the absence of electric currents, which holds the promise of a competitive alternative to magnetic skyrmion-based technologies.

Keywords: Ferroelectric; Domains; Bubbles