Geometric Spin Rotation in Triangular Antiferromagnets
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866915725548978176 |
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| author | Adamyan, Grigor Pradenas, Bastian Ivanov, Boris Tchernyshyov, Oleg |
| author_facet | Adamyan, Grigor Pradenas, Bastian Ivanov, Boris Tchernyshyov, Oleg |
| contents | We describe a geometric phenomenon in which a traveling wave made of degenerate Goldstone modes leaves behind a transformed ground state. In a triangular Heisenberg antiferromagnet, a pulse of circularly polarized spin waves rotates the spins within their plane. An exact solution of the nonlinear equations of motion demonstrates that the accumulated rotation is a geometric phase related to parallel transport of the order parameter. We point out a curious analogy between the motion of the magnetic order parameter and that of a wobbling coin. This phenomenon opens a new route for controlling antiferromagnetic order by spin waves and may extend to other frustrated magnets as well as other physical systems with noncommuting broken-symmetry generators. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_07914 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Geometric Spin Rotation in Triangular Antiferromagnets Adamyan, Grigor Pradenas, Bastian Ivanov, Boris Tchernyshyov, Oleg Strongly Correlated Electrons Pattern Formation and Solitons We describe a geometric phenomenon in which a traveling wave made of degenerate Goldstone modes leaves behind a transformed ground state. In a triangular Heisenberg antiferromagnet, a pulse of circularly polarized spin waves rotates the spins within their plane. An exact solution of the nonlinear equations of motion demonstrates that the accumulated rotation is a geometric phase related to parallel transport of the order parameter. We point out a curious analogy between the motion of the magnetic order parameter and that of a wobbling coin. This phenomenon opens a new route for controlling antiferromagnetic order by spin waves and may extend to other frustrated magnets as well as other physical systems with noncommuting broken-symmetry generators. |
| title | Geometric Spin Rotation in Triangular Antiferromagnets |
| topic | Strongly Correlated Electrons Pattern Formation and Solitons |
| url | https://arxiv.org/abs/2601.07914 |