Magnetic order and excitations in the magnetically intercalated van der Waals material Cr$_{\frac{1}{4}}$NbSe$_2$
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| Autori principali: | , , , , , , , , , , , , |
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| Natura: | Preprint |
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2026
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| _version_ | 1866908947777060864 |
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| author | Yamaoka, Ryota Saito, Hiraku Settai, Yuki Huang, Xiang Nishio-Hamane, Daisuke Takahashi, Shingo Ueta, Daichi Oda, Tatsuro Kikuchi, Hodaka Hong, Tao Nakano, Masaki Seki, Shinichiro Nakajima, Taro |
| author_facet | Yamaoka, Ryota Saito, Hiraku Settai, Yuki Huang, Xiang Nishio-Hamane, Daisuke Takahashi, Shingo Ueta, Daichi Oda, Tatsuro Kikuchi, Hodaka Hong, Tao Nakano, Masaki Seki, Shinichiro Nakajima, Taro |
| contents | Cr$_{\frac{1}{4}}$NbSe$_2$ is a triangular lattice magnet in which magnetic Cr$^{3+}$ ions are intercalated to form triangular lattices between NbSe$_2$ van der Waals layers stacked along the c axis. By unpolarized and polarized neutron scattering experiments, we have revealed that the magnetic ground state of this system is a 120$^{\circ}$-type antiferromagnetic order characterized by the magnetic propagation wave vector of $q=(\frac{1}{3}, \frac{1}{3}, 0)$. We also performed inelastic neutron scattering measurements using co-aligned single crystals, and determined dispersion relations of magnetic excitations at low temperatures. Comparing the observed spectra with calculations based on the linear spin-wave theory, we revealed that the out-of-plane ferromagnetic interaction is fairly strong as compared to the in-plane nearest neighbor antiferromagnetic interaction. Although the crystal structure of this system is composed of two-dimensional van der Waals layers, the magnetic order has a three dimensional character, which would be attributed to long-range magnetic interactions mediated by conduction electrons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_07117 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Magnetic order and excitations in the magnetically intercalated van der Waals material Cr$_{\frac{1}{4}}$NbSe$_2$ Yamaoka, Ryota Saito, Hiraku Settai, Yuki Huang, Xiang Nishio-Hamane, Daisuke Takahashi, Shingo Ueta, Daichi Oda, Tatsuro Kikuchi, Hodaka Hong, Tao Nakano, Masaki Seki, Shinichiro Nakajima, Taro Strongly Correlated Electrons Cr$_{\frac{1}{4}}$NbSe$_2$ is a triangular lattice magnet in which magnetic Cr$^{3+}$ ions are intercalated to form triangular lattices between NbSe$_2$ van der Waals layers stacked along the c axis. By unpolarized and polarized neutron scattering experiments, we have revealed that the magnetic ground state of this system is a 120$^{\circ}$-type antiferromagnetic order characterized by the magnetic propagation wave vector of $q=(\frac{1}{3}, \frac{1}{3}, 0)$. We also performed inelastic neutron scattering measurements using co-aligned single crystals, and determined dispersion relations of magnetic excitations at low temperatures. Comparing the observed spectra with calculations based on the linear spin-wave theory, we revealed that the out-of-plane ferromagnetic interaction is fairly strong as compared to the in-plane nearest neighbor antiferromagnetic interaction. Although the crystal structure of this system is composed of two-dimensional van der Waals layers, the magnetic order has a three dimensional character, which would be attributed to long-range magnetic interactions mediated by conduction electrons. |
| title | Magnetic order and excitations in the magnetically intercalated van der Waals material Cr$_{\frac{1}{4}}$NbSe$_2$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2604.07117 |