Anisotropic magnons in a layered honeycomb ferromagnet
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arXiv
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| Format: | Preprint |
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2026
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| author | Williams, Travis J. Abernathy, Douglas L. Lumsden, Mark D. Yan, Jiaqiang Christianson, Andrew D. |
| author_facet | Williams, Travis J. Abernathy, Douglas L. Lumsden, Mark D. Yan, Jiaqiang Christianson, Andrew D. |
| contents | Recent experimental and theoretical studies have suggested a possible Dirac magnon gap in the two-dimensional ferromagnetic semiconductor CrSiTe$_3$. Detailed neutron scattering measurements were performed to shed light on the existence of the magnon gap, and suggest that the gap is very small or non-existent, with previous measurements being complicated by experimental factors. During these measurements, it was found that the out-of-plane couplings could explain the usual property of the increase in the magnetic transition temperature when CrSiTe$_3$ is exfoliated to monolayers. Furthermore, the material was shown to have anisotropic magnons along the out-of-plane direction, through the proposed Dirac point. We speculate that this is due to an exchange anisotropy, though Kitaev-like interactions alone cannot explain the spectra. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_19935 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Anisotropic magnons in a layered honeycomb ferromagnet Williams, Travis J. Abernathy, Douglas L. Lumsden, Mark D. Yan, Jiaqiang Christianson, Andrew D. Strongly Correlated Electrons Recent experimental and theoretical studies have suggested a possible Dirac magnon gap in the two-dimensional ferromagnetic semiconductor CrSiTe$_3$. Detailed neutron scattering measurements were performed to shed light on the existence of the magnon gap, and suggest that the gap is very small or non-existent, with previous measurements being complicated by experimental factors. During these measurements, it was found that the out-of-plane couplings could explain the usual property of the increase in the magnetic transition temperature when CrSiTe$_3$ is exfoliated to monolayers. Furthermore, the material was shown to have anisotropic magnons along the out-of-plane direction, through the proposed Dirac point. We speculate that this is due to an exchange anisotropy, though Kitaev-like interactions alone cannot explain the spectra. |
| title | Anisotropic magnons in a layered honeycomb ferromagnet |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2602.19935 |