Creating currents of electric bubbles

Abstract

The experimental demonstration of electric skyrmion bubbles and the recent prediction of their Brownian motion have brought topological ferroelectrics close to their magnetic counterparts. Electric bubbles (e-bubbles) could potentially be leveraged in applications for which magnetic skyrmions have been proposed (e.g., neuromorphic computing). Yet, we still lack a strategy to create currents of e-bubbles. Here, using predictive atomistic simulations, we illustrate two approaches to induce e-bubble currents by application of suitable electric fields, static or dynamic. We focus on regimes where e-bubbles display spontaneous diffusion, which allows us to generate a current by simply biasing their Brownian motion. Our calculations indicate that e-bubble velocities over 25 m/s can be achieved at room temperature, suggesting that these electric quasiparticles could rival the speeds of magnetic skyrmions upon further optimization.

5 pages, 6 figures

References in corpus (14)

• Spin Transfer Torques in MnSi at Ultra-low Current Densities
• Skyrmion Gas Manipulation for Probabilistic Computing
• Second-principles method including electron and lattice degrees of freedom
• First-principles model potentials for lattice-dynamical studies: general methodology and example of application to ferroic perovskite oxides
• Tuning of the depolarization field and nanodomain structure in ferroelectric thin films
• Brownian reservoir computing realized using geometrically confined skyrmions
• Fast current-induced skyrmion motion in synthetic antiferromagnets
• Pattern recognition with neuromorphic computing using magnetic-field induced dynamics of skyrmions
• Probabilistic computing with p-bits
• Roadmap for Unconventional Computing with Nanotechnology
• Brownian electric bubble quasiparticles
• Giant voltage amplification from incipient ferroelectric states
• Dynamical manipulation of polar topologies from acoustic phonon pumping
• Liquid-crystal-like dynamic transition in ferroelectric/dielectric superlattices