Spin-Hall-Like Magnon Transport in a Synthetic Antiferromagnetic Skyrmion Lattice
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866916053103149056 |
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| author | Zheng, Xingen Liu, Xuejuan Wang, Zhenyu Kang, Jiyong Li, Zhixiong Wu, Hao |
| author_facet | Zheng, Xingen Liu, Xuejuan Wang, Zhenyu Kang, Jiyong Li, Zhixiong Wu, Hao |
| contents | We investigate spin-Hall-like magnon edge transport in a synthetic antiferromagnetic skyrmion lattice composed of two antiferromagnetically coupled skyrmion lattice layers with opposite magnetic textures. Based on a relaxed bilayer texture from micromagnetic simulations, we construct the bosonic Bogoliubov-de Gennes Hamiltonian within linear spin-wave theory and calculate the bulk and strip magnon spectrum. We find counterpropagating in-gap edge modes with opposite layer polarization, whose layer-resolved propagation is further confirmed by dynamical micromagnetic simulations. A symmetry analysis shows that the fully coupled system lacks the pseudo-time-reversal symmetry required for a genuine bosonic Z2 topological phase. Thus, the observed edge modes are not Z2-protected helical magnon edge states, but layer-polarized, spin-Hall-like modes originating from the opposite Hall tendencies of the two skyrmion lattice layers. These results establish synthetic antiferromagnetic skyrmion lattices as a platform for spin-Hall-like magnon transport beyond a strict bosonic Z2 classification. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_27822 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Spin-Hall-Like Magnon Transport in a Synthetic Antiferromagnetic Skyrmion Lattice Zheng, Xingen Liu, Xuejuan Wang, Zhenyu Kang, Jiyong Li, Zhixiong Wu, Hao Mesoscale and Nanoscale Physics We investigate spin-Hall-like magnon edge transport in a synthetic antiferromagnetic skyrmion lattice composed of two antiferromagnetically coupled skyrmion lattice layers with opposite magnetic textures. Based on a relaxed bilayer texture from micromagnetic simulations, we construct the bosonic Bogoliubov-de Gennes Hamiltonian within linear spin-wave theory and calculate the bulk and strip magnon spectrum. We find counterpropagating in-gap edge modes with opposite layer polarization, whose layer-resolved propagation is further confirmed by dynamical micromagnetic simulations. A symmetry analysis shows that the fully coupled system lacks the pseudo-time-reversal symmetry required for a genuine bosonic Z2 topological phase. Thus, the observed edge modes are not Z2-protected helical magnon edge states, but layer-polarized, spin-Hall-like modes originating from the opposite Hall tendencies of the two skyrmion lattice layers. These results establish synthetic antiferromagnetic skyrmion lattices as a platform for spin-Hall-like magnon transport beyond a strict bosonic Z2 classification. |
| title | Spin-Hall-Like Magnon Transport in a Synthetic Antiferromagnetic Skyrmion Lattice |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2605.27822 |