Realization of a Spin-1/2 Hexagonal-Plaquette Chain with Ising-Like Anisotropy
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909781374009344 |
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| author | Yamaguchi, Hironori Furuya, Shunsuke C. Tominaga, Yu Araki, Koji Hagiwara, Masayuki |
| author_facet | Yamaguchi, Hironori Furuya, Shunsuke C. Tominaga, Yu Araki, Koji Hagiwara, Masayuki |
| contents | We present the realization of a spin-1/2 hexagonal-plaquette chain with Ising anisotropy, an unexplored quantum spin model that serves as a platform for investigating anisotropic quantum magnetism. Specific heat at zero field reveals a sharp peak at $T_{\rm{N}}$ = 1.0 K, indicating a phase transition to a N$\acute{\rm{e}}$el order stabilized by interchain couplings. A perturbative analysis maps the system onto an effective spin-1/2 Ising-like chain, supporting the presence of an anisotropy-induced excitation gap. Furthermore, the interchain interactions may induce discrete excitations in the spinon continuum, reminiscent of Zeeman ladder physics observed in related 1D Ising-like systems. These results establish a well-defined model system for correlated spin phenomena in anisotropic magnets and highlight a route for engineering Ising-like quantum states in molecular-based frameworks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_09060 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Realization of a Spin-1/2 Hexagonal-Plaquette Chain with Ising-Like Anisotropy Yamaguchi, Hironori Furuya, Shunsuke C. Tominaga, Yu Araki, Koji Hagiwara, Masayuki Strongly Correlated Electrons We present the realization of a spin-1/2 hexagonal-plaquette chain with Ising anisotropy, an unexplored quantum spin model that serves as a platform for investigating anisotropic quantum magnetism. Specific heat at zero field reveals a sharp peak at $T_{\rm{N}}$ = 1.0 K, indicating a phase transition to a N$\acute{\rm{e}}$el order stabilized by interchain couplings. A perturbative analysis maps the system onto an effective spin-1/2 Ising-like chain, supporting the presence of an anisotropy-induced excitation gap. Furthermore, the interchain interactions may induce discrete excitations in the spinon continuum, reminiscent of Zeeman ladder physics observed in related 1D Ising-like systems. These results establish a well-defined model system for correlated spin phenomena in anisotropic magnets and highlight a route for engineering Ising-like quantum states in molecular-based frameworks. |
| title | Realization of a Spin-1/2 Hexagonal-Plaquette Chain with Ising-Like Anisotropy |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.09060 |