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Propagation dynamics of spin excitations along skyrmion strings
Magnetic skyrmions, topological solitons characterized by a two-dimensional swirling spin texture, have recently attracted attention as stable particle-like objects. In a three-dimensional system, a skyrmion can extend in the third dimension forming a robust and flexible string structure, whose uniq...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6959257/ https://www.ncbi.nlm.nih.gov/pubmed/31937762 http://dx.doi.org/10.1038/s41467-019-14095-0 |
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author | Seki, S. Garst, M. Waizner, J. Takagi, R. Khanh, N. D. Okamura, Y. Kondou, K. Kagawa, F. Otani, Y. Tokura, Y. |
author_facet | Seki, S. Garst, M. Waizner, J. Takagi, R. Khanh, N. D. Okamura, Y. Kondou, K. Kagawa, F. Otani, Y. Tokura, Y. |
author_sort | Seki, S. |
collection | PubMed |
description | Magnetic skyrmions, topological solitons characterized by a two-dimensional swirling spin texture, have recently attracted attention as stable particle-like objects. In a three-dimensional system, a skyrmion can extend in the third dimension forming a robust and flexible string structure, whose unique topology and symmetry are anticipated to host nontrivial functional responses. Here we experimentally demonstrate the coherent propagation of spin excitations along skyrmion strings for the chiral-lattice magnet Cu(2)OSeO(3). We find that this propagation is directionally non-reciprocal and the degree of non-reciprocity, as well as group velocity and decay length, are strongly dependent on the character of the excitation modes. These spin excitations can propagate over a distance exceeding 50 μm, demonstrating the excellent long-range ordered nature of the skyrmion-string structure. Our combined experimental and theoretical analyses offer a comprehensive account of the propagation dynamics of skyrmion-string excitations and suggest the possibility of unidirectional information transfer along such topologically protected strings. |
format | Online Article Text |
id | pubmed-6959257 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-69592572020-01-15 Propagation dynamics of spin excitations along skyrmion strings Seki, S. Garst, M. Waizner, J. Takagi, R. Khanh, N. D. Okamura, Y. Kondou, K. Kagawa, F. Otani, Y. Tokura, Y. Nat Commun Article Magnetic skyrmions, topological solitons characterized by a two-dimensional swirling spin texture, have recently attracted attention as stable particle-like objects. In a three-dimensional system, a skyrmion can extend in the third dimension forming a robust and flexible string structure, whose unique topology and symmetry are anticipated to host nontrivial functional responses. Here we experimentally demonstrate the coherent propagation of spin excitations along skyrmion strings for the chiral-lattice magnet Cu(2)OSeO(3). We find that this propagation is directionally non-reciprocal and the degree of non-reciprocity, as well as group velocity and decay length, are strongly dependent on the character of the excitation modes. These spin excitations can propagate over a distance exceeding 50 μm, demonstrating the excellent long-range ordered nature of the skyrmion-string structure. Our combined experimental and theoretical analyses offer a comprehensive account of the propagation dynamics of skyrmion-string excitations and suggest the possibility of unidirectional information transfer along such topologically protected strings. Nature Publishing Group UK 2020-01-14 /pmc/articles/PMC6959257/ /pubmed/31937762 http://dx.doi.org/10.1038/s41467-019-14095-0 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Seki, S. Garst, M. Waizner, J. Takagi, R. Khanh, N. D. Okamura, Y. Kondou, K. Kagawa, F. Otani, Y. Tokura, Y. Propagation dynamics of spin excitations along skyrmion strings |
title | Propagation dynamics of spin excitations along skyrmion strings |
title_full | Propagation dynamics of spin excitations along skyrmion strings |
title_fullStr | Propagation dynamics of spin excitations along skyrmion strings |
title_full_unstemmed | Propagation dynamics of spin excitations along skyrmion strings |
title_short | Propagation dynamics of spin excitations along skyrmion strings |
title_sort | propagation dynamics of spin excitations along skyrmion strings |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6959257/ https://www.ncbi.nlm.nih.gov/pubmed/31937762 http://dx.doi.org/10.1038/s41467-019-14095-0 |
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