Inelastic neutron scattering study on the AFM uniform spin-1/2 chain compound CuSb2O6
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866908973363363840 |
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| author | Hasea, Masashi Soda, Minoru Masuda, Takatsugu Itoh, Shinichi Yokoo, Tetsuya |
| author_facet | Hasea, Masashi Soda, Minoru Masuda, Takatsugu Itoh, Shinichi Yokoo, Tetsuya |
| contents | We carried out inelastic neutron scattering experiments on a powdered sample of the antiferromagnetic (AFM) uniform spin-1/2 chain compound CuSb2O6.The magnetic excitations appear in the energy range of 1.8 to 13 meV at 2.5 K below the AFM transition temperature (TN = 8.7 K).The gap value (1.8 meV) is close to that evaluated from the specific heat (1.51 meV). The excitations at 12.5 K (> TN) appear gapless. Thus, the 1.8 meV gap is caused by some anisotropy in spin-wave excitations. The gap excitations are strongest at 0.48 corresponding to a length of 0.66 nm. This result is consistent with the theoretical one that the interaction in a Cu pair with a length of 0.65562 nm (Jab) is strongest. The magnetic excitations can be explained by the AFM uniform XXZ chain with Jab = 6.437 meV and DJab = 0.063 meV. The 1.8 meV gap is caused by the small Ising anisotropy (DJab/Jab = 0.0098). |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_15608 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Inelastic neutron scattering study on the AFM uniform spin-1/2 chain compound CuSb2O6 Hasea, Masashi Soda, Minoru Masuda, Takatsugu Itoh, Shinichi Yokoo, Tetsuya Strongly Correlated Electrons We carried out inelastic neutron scattering experiments on a powdered sample of the antiferromagnetic (AFM) uniform spin-1/2 chain compound CuSb2O6.The magnetic excitations appear in the energy range of 1.8 to 13 meV at 2.5 K below the AFM transition temperature (TN = 8.7 K).The gap value (1.8 meV) is close to that evaluated from the specific heat (1.51 meV). The excitations at 12.5 K (> TN) appear gapless. Thus, the 1.8 meV gap is caused by some anisotropy in spin-wave excitations. The gap excitations are strongest at 0.48 corresponding to a length of 0.66 nm. This result is consistent with the theoretical one that the interaction in a Cu pair with a length of 0.65562 nm (Jab) is strongest. The magnetic excitations can be explained by the AFM uniform XXZ chain with Jab = 6.437 meV and DJab = 0.063 meV. The 1.8 meV gap is caused by the small Ising anisotropy (DJab/Jab = 0.0098). |
| title | Inelastic neutron scattering study on the AFM uniform spin-1/2 chain compound CuSb2O6 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2604.15608 |