Interaction and collision of skyrmions in chiral antiferromagnets
Skyrmions in an antiferromagnet can travel as solitary waves in stark contrast to the situation in ferromagnets. Traveling skyrmion solutions have been found numerically in chiral antiferromagnets. We study head-on collision events between two skyrmions. We find that the result of the collision depe...
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2025-01-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.18.1.037 |
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| author | George Theodorou, Bruno Barton-Singer, Stavros Komineas |
| author_facet | George Theodorou, Bruno Barton-Singer, Stavros Komineas |
| author_sort | George Theodorou, Bruno Barton-Singer, Stavros Komineas |
| collection | DOAJ |
| description | Skyrmions in an antiferromagnet can travel as solitary waves in stark contrast to the situation in ferromagnets. Traveling skyrmion solutions have been found numerically in chiral antiferromagnets. We study head-on collision events between two skyrmions. We find that the result of the collision depends on the initial velocity of the skyrmions. For small velocities, the skyrmions shrink as they approach, then bounce back and eventually acquire almost their initial speed. For larger velocities, the skyrmions approach each other and shrink until they become singular points at some finite separation and are eventually annihilated. Considering skyrmion energetics, we can determine the regimes of the different dynamical behaviors. Using a collective co-ordinate approach, we reproduce the dynamics of the collisions including the variation of the size of the skyrmions and collapse above a critical velocity. |
| format | Article |
| id | doaj-art-8b785d7b2e9443acb5c61ba2e2439179 |
| institution | Kabale University |
| issn | 2542-4653 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj-art-8b785d7b2e9443acb5c61ba2e24391792025-01-30T13:21:11ZengSciPostSciPost Physics2542-46532025-01-0118103710.21468/SciPostPhys.18.1.037Interaction and collision of skyrmions in chiral antiferromagnetsGeorge Theodorou, Bruno Barton-Singer, Stavros KomineasSkyrmions in an antiferromagnet can travel as solitary waves in stark contrast to the situation in ferromagnets. Traveling skyrmion solutions have been found numerically in chiral antiferromagnets. We study head-on collision events between two skyrmions. We find that the result of the collision depends on the initial velocity of the skyrmions. For small velocities, the skyrmions shrink as they approach, then bounce back and eventually acquire almost their initial speed. For larger velocities, the skyrmions approach each other and shrink until they become singular points at some finite separation and are eventually annihilated. Considering skyrmion energetics, we can determine the regimes of the different dynamical behaviors. Using a collective co-ordinate approach, we reproduce the dynamics of the collisions including the variation of the size of the skyrmions and collapse above a critical velocity.https://scipost.org/SciPostPhys.18.1.037 |
| spellingShingle | George Theodorou, Bruno Barton-Singer, Stavros Komineas Interaction and collision of skyrmions in chiral antiferromagnets SciPost Physics |
| title | Interaction and collision of skyrmions in chiral antiferromagnets |
| title_full | Interaction and collision of skyrmions in chiral antiferromagnets |
| title_fullStr | Interaction and collision of skyrmions in chiral antiferromagnets |
| title_full_unstemmed | Interaction and collision of skyrmions in chiral antiferromagnets |
| title_short | Interaction and collision of skyrmions in chiral antiferromagnets |
| title_sort | interaction and collision of skyrmions in chiral antiferromagnets |
| url | https://scipost.org/SciPostPhys.18.1.037 |
| work_keys_str_mv | AT georgetheodoroubrunobartonsingerstavroskomineas interactionandcollisionofskyrmionsinchiralantiferromagnets |