Creation, annihilation and transport of nonmagnetic antiskyrmions within Ginzburg-Landau-Devonshire model
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866912064295927808 |
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| author | Stepkova, V. Hlinka, J. |
| author_facet | Stepkova, V. Hlinka, J. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_05906 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Creation, annihilation and transport of nonmagnetic antiskyrmions within Ginzburg-Landau-Devonshire model Stepkova, V. Hlinka, J. Materials Science Mesoscale and Nanoscale Physics Pattern Formation and Solitons 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. |
| title | Creation, annihilation and transport of nonmagnetic antiskyrmions within Ginzburg-Landau-Devonshire model |
| topic | Materials Science Mesoscale and Nanoscale Physics Pattern Formation and Solitons |
| url | https://arxiv.org/abs/2410.05906 |