articleNatureFeb 14, 2024HYBRID OA

A 2D ferroelectric vortex pattern in twisted BaTiO3 freestanding layers

GSGabriel Sánchez‐SantolinoVRV. RoucoSPSergio PueblaHAHugo AramberriVZVíctor Zamora

Universidad Complutense de Madrid · Consejo Superior de Investigaciones Científicas · +3 more institutions

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Abstract

Abstract The wealth of complex polar topologies 1–10 recently found in nanoscale ferroelectrics results from a delicate balance between the intrinsic tendency of the materials to develop a homogeneous polarization and the electric and mechanical boundary conditions imposed on them. Ferroelectric–dielectric interfaces are model systems in which polarization curling originates from open circuit-like electric boundary conditions, to avoid the build-up of polarization charges through the formation of flux-closure 11–14 domains that evolve into vortex-like structures at the nanoscale 15–17 level. Although ferroelectricity is known to couple strongly with strain (both homogeneous 18 and inhomogeneous 19,20 ), the…

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Topics & keywords

Topics
Keywords
  • Ferroelectricity
  • Vortex
  • Condensed matter physics
  • Polarization (electrochemistry)
  • Materials science
  • Dielectric
  • Nanoscopic scale
  • Flexoelectricity
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