Kitaev interactions in the van der Waals antiferromagnet VBr3
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866910036399226880 |
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| author | Kao, Zeyu Gu, Yimeng Gu, Yiqing Zhang, Hao Zheng, Shiyi Murai, Naoki Ohira-Kawamura, Seiko Zhao, Jun |
| author_facet | Kao, Zeyu Gu, Yimeng Gu, Yiqing Zhang, Hao Zheng, Shiyi Murai, Naoki Ohira-Kawamura, Seiko Zhao, Jun |
| contents | Van der Waals materials hosting Kitaev interactions are promising platforms for exploring exotic quantum phenomena. Here, we report inelastic neutron scattering investigations of the van der Waals antiferromagnet VBr3, which forms a honeycomb lattice structure at room temperature and exhibits zigzag-type magnetic order below 26.5 K. Our observations reveal distinctive low-energy spin excitations arising from gamma, gamma', and M' points, each featuring a spin gap of around 2.5 meV. The overall spin excitation spectra can be effectively described by a spin Hamiltonian incorporating substantial nearest-neighbor Kitaev and biquadratic interactions, along with Heisenberg interactions. Our findings not only establish VBr3 as a new Kitaev magnet but also suggest that ligand engineering may provide a promising strategy to modulate Kitaev interactions, offering new opportunities for designing Kitaev materials with tailored quantum properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_05001 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Kitaev interactions in the van der Waals antiferromagnet VBr3 Kao, Zeyu Gu, Yimeng Gu, Yiqing Zhang, Hao Zheng, Shiyi Murai, Naoki Ohira-Kawamura, Seiko Zhao, Jun Strongly Correlated Electrons Materials Science Van der Waals materials hosting Kitaev interactions are promising platforms for exploring exotic quantum phenomena. Here, we report inelastic neutron scattering investigations of the van der Waals antiferromagnet VBr3, which forms a honeycomb lattice structure at room temperature and exhibits zigzag-type magnetic order below 26.5 K. Our observations reveal distinctive low-energy spin excitations arising from gamma, gamma', and M' points, each featuring a spin gap of around 2.5 meV. The overall spin excitation spectra can be effectively described by a spin Hamiltonian incorporating substantial nearest-neighbor Kitaev and biquadratic interactions, along with Heisenberg interactions. Our findings not only establish VBr3 as a new Kitaev magnet but also suggest that ligand engineering may provide a promising strategy to modulate Kitaev interactions, offering new opportunities for designing Kitaev materials with tailored quantum properties. |
| title | Kitaev interactions in the van der Waals antiferromagnet VBr3 |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2601.05001 |