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arXiv · 2410.05906

Creation, annihilation and transport of nonmagnetic antiskyrmions within Ginzburg-Landau-Devonshire model

V. Stepkova·J. Hlinka
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Abstract

Atomistic model calculations recently revealed that the polarization pattern at the cross-section through nanoscale ferroelectric nanodomains in rhombohedral barium titanate shows a clear antiskyrmion attributes such as the net invariant topological charge of minus two. The present work confirms that these topological defects also exist as local minima in the discretized Ginzburg-Landau-Devonshire model, which is widely used in the phase-field modeling studies. We explore by phase-field simulations how an electric field can be used to create or move antiskyrmions within a monodomain ferroelectric matrix. The process of the field-induced antiskyrmion annihilation reveals the existence of a discrete ladder of intermediate antiskyrmion states with distinct radii but common symmetry, topology and geometrical properties.

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V. Stepkova, J. Hlinka. 2024-10-08. Creation, annihilation and transport of nonmagnetic antiskyrmions within Ginzburg-Landau-Devonshire model. https://arxiv.org/abs/2410.05906

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