Dynamics of Polar Skyrmion Bubbles under Electric Fields

Abstract

Room-temperature polar skyrmion bubbles that are recently found in oxide superlattice, have received enormous interests for their potential applications in nanoelectronics due to the nanometer size, emergent chirality, and negative capacitance. For practical applications, the ability to controllably manipulate them by using external stimuli is prerequisite. Here, we study the dynamics of individual polar skyrmion bubbles at the nanoscale by using in situ biasing in a scanning transmission electron microscope. The reversible electric field-driven phase transition between topological and trivial polar states are demonstrated. We create, erase and monitor the shrinkage and expansion of individual polar skyrmions. We find that their transition behaviors are substantially different from that of magnetic analogue. The underlying mechanism is discussed by combing with the phase-field simulations. The controllable manipulation of nanoscale polar skyrmions allows us to tune the dielectric permittivity at atomic scale and detailed knowledge of their phase transition behaviors provides fundamentals for their applications in nanoelectronics.

References in corpus (9)

• Observation of room temperature magnetic skyrmions and their current-driven dynamics in ultrathin Co films
• Blowing Magnetic Skyrmion Bubbles
• Emergent electrodynamics of skyrmions in a chiral magnet
• Room-temperature current-induced generation and motion of sub-100nm skyrmions
• Subterahertz collective dynamics of polar vortices
• Blowing Polar Skyrmion Bubbles in Oxide Superlattices
• Atomic-scale observations of electrical and mechanical manipulation of topological polar flux-closure
• Atomic Imaging of Mechanically Induced Topological Transition of Ferroelectric Vortices
• Local Manipulation of Polar Skyrmions and Topological Phase Transitions

Cited by in corpus (12)

• Electrical control of magnetism by electric field and current-induced torques
• Hexagonal close-packed polar-skyrmion lattice in ultrathin ferroelectric PbTiO3 films
• Dynamical control of topology in ferroelectric skyrmions via twisted light
• Antiskyrmionic ferroelectric medium
• Terahertz-field activation of polar skyrons
• Switchable Skyrmion-Antiskyrmion Tubes in Rhombohedral BaTiO${}_3$ and Related Materials
• Magnetoelectric imprint of skyrmions in van der Waals bilayers
• Poincaré sphere engineering of dynamical ferroelectric topological solitons
• Thermal Stability and Topological Charge Fragmentation in Antiskyrmions of Rhombohedral Barium Titanate
• Topological Textures in Zr-Substituted Barium Titanate
• Theory of Polar Skyrmions in Layered Structure of Ferroelectric Perovskites
• Emergent higher-order optical nonlinearity in self-assembled polar supertextures