Magnetic D-brane solitons: skyrmion strings ending on a Néel wall in chiral magnets
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866917019523219456 |
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| author | Gudnason, Sven Bjarke Nitta, Muneto |
| author_facet | Gudnason, Sven Bjarke Nitta, Muneto |
| contents | Magnetic skyrmions extended to three dimensions form string-like objects whose fundamental role remains largely unexplored. We show that skyrmion strings can terminate on a Néel-type domain wall (DW), realizing a magnetic analogue of a Dirichlet(D)-brane soliton. While an isolated Néel DW tends to rotate into a Bloch DW, the Néel DW is stabilized when a skyrmion string ends on it. Unlike field-theory D-branes, the Bloch-type DMI produces linear rather than logarithmic DW bending, and the strings retain finite width far from the DW, circumventing singular behavior. Furthermore, the repulsive interaction between strings allows periodic multi-junction solutions, yielding a square lattice of alternating strings and local DW deformations. These results establish magnetic skyrmion strings as fundamental strings that can end on a D-brane. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_14689 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic D-brane solitons: skyrmion strings ending on a Néel wall in chiral magnets Gudnason, Sven Bjarke Nitta, Muneto Mesoscale and Nanoscale Physics High Energy Physics - Phenomenology High Energy Physics - Theory Magnetic skyrmions extended to three dimensions form string-like objects whose fundamental role remains largely unexplored. We show that skyrmion strings can terminate on a Néel-type domain wall (DW), realizing a magnetic analogue of a Dirichlet(D)-brane soliton. While an isolated Néel DW tends to rotate into a Bloch DW, the Néel DW is stabilized when a skyrmion string ends on it. Unlike field-theory D-branes, the Bloch-type DMI produces linear rather than logarithmic DW bending, and the strings retain finite width far from the DW, circumventing singular behavior. Furthermore, the repulsive interaction between strings allows periodic multi-junction solutions, yielding a square lattice of alternating strings and local DW deformations. These results establish magnetic skyrmion strings as fundamental strings that can end on a D-brane. |
| title | Magnetic D-brane solitons: skyrmion strings ending on a Néel wall in chiral magnets |
| topic | Mesoscale and Nanoscale Physics High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2510.14689 |