Two-Dimensional Twisted Ferromagnetic Domain Wall as a Spin-Wave Diffraction Grating
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arXiv
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866917202819547136 |
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| author | Faridi, Ehsan Kim, Se Kwon Vignale, Giovanni |
| author_facet | Faridi, Ehsan Kim, Se Kwon Vignale, Giovanni |
| contents | We present a theoretical study of spin-wave scattering by a twisted domain wall (DW) in a two-dimensional ferromagnet with easy-axis anisotropy. While the twisted DW generates an effective gauge field for spin waves, leading to a deflection of their trajectories, our main focus is on a distinct effect that arises when a hard-axis anisotropy is present in addition to the easy-axis anisotropy. In this case, the translational symmetry of the spin-wave Hamiltonian along the DW is broken, resulting in a periodic modulation of the Hamiltonian. This periodicity leads to the formation of multiple diffracted spin wave modes on both sides of the DW, engendering a DW-induced magnonic diffraction pattern. The interplay between the emergent gauge field and the anisotropy-induced periodicity reveals rich spin-wave dynamics and suggests potential applications for manipulating magnon flow in two-dimensional magnetic textures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_08993 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Two-Dimensional Twisted Ferromagnetic Domain Wall as a Spin-Wave Diffraction Grating Faridi, Ehsan Kim, Se Kwon Vignale, Giovanni Mesoscale and Nanoscale Physics Applied Physics We present a theoretical study of spin-wave scattering by a twisted domain wall (DW) in a two-dimensional ferromagnet with easy-axis anisotropy. While the twisted DW generates an effective gauge field for spin waves, leading to a deflection of their trajectories, our main focus is on a distinct effect that arises when a hard-axis anisotropy is present in addition to the easy-axis anisotropy. In this case, the translational symmetry of the spin-wave Hamiltonian along the DW is broken, resulting in a periodic modulation of the Hamiltonian. This periodicity leads to the formation of multiple diffracted spin wave modes on both sides of the DW, engendering a DW-induced magnonic diffraction pattern. The interplay between the emergent gauge field and the anisotropy-induced periodicity reveals rich spin-wave dynamics and suggests potential applications for manipulating magnon flow in two-dimensional magnetic textures. |
| title | Two-Dimensional Twisted Ferromagnetic Domain Wall as a Spin-Wave Diffraction Grating |
| topic | Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2601.08993 |