Cascade of Spin Liquids in a Bilayer Triangular-lattice Antiferromagnet Rb_2Co_2(SeO_3)_3
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917387434983424 |
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| author | Xu, Xiaoyu Wang, Yunlong Gui, Xuejuan Luo, Jun Duan, Guijing Shi, Ke Wang, Zhaosheng Li, Shuo Ren, Huifen Xi, Chuanying Ling, Langsheng Wu, Zhanlong Chen, Ying Bo, Xiaohui Shi, Xinyu Du, Kefan Bian, Rui Yang, Jie Cui, Yi Zhou, Rui Wang, Jinchen Yu, Rong Yu, Weiqiang |
| author_facet | Xu, Xiaoyu Wang, Yunlong Gui, Xuejuan Luo, Jun Duan, Guijing Shi, Ke Wang, Zhaosheng Li, Shuo Ren, Huifen Xi, Chuanying Ling, Langsheng Wu, Zhanlong Chen, Ying Bo, Xiaohui Shi, Xinyu Du, Kefan Bian, Rui Yang, Jie Cui, Yi Zhou, Rui Wang, Jinchen Yu, Rong Yu, Weiqiang |
| contents | In frustrated Ising magnets, classical spin liquids (CSLs) with macroscopic ground-state degeneracy can survive against conventional magnetic order, as exemplified by systems on triangular, kagome and pyrochlore lattices at zero field. Here we report the discovery of a high-field route toward spin liquids in a bilayer triangular lattice antiferromagnet, Rb$_2$Co$_2$(SeO$_3$)$_3$. We demonstrate that a cascade of CSLs -- characterized by doubly degenerate one-up-one-down local spin configurations and a residual entropy of 1/2(1-M/M_s)Rln2 per mole -- emerges through field-controlled dilution of Ising dimers. Owing to the interplay of intra- and inter-layer interactions, these CSLs are further stabilized by lattice symmetry breaking at fractional magnetization plateaus. Such field-induced spin liquids can be understood as a consequence of generalized ice rules, analogous to those governing in pyrochlore antiferromagnets. In particular, the 5/6-plateau state is a candidate quantum spin liquid. Our results thereby establish a new pathway for exploring diverse spin liquid states across both classical and quantum regimes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_03737 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Cascade of Spin Liquids in a Bilayer Triangular-lattice Antiferromagnet Rb_2Co_2(SeO_3)_3 Xu, Xiaoyu Wang, Yunlong Gui, Xuejuan Luo, Jun Duan, Guijing Shi, Ke Wang, Zhaosheng Li, Shuo Ren, Huifen Xi, Chuanying Ling, Langsheng Wu, Zhanlong Chen, Ying Bo, Xiaohui Shi, Xinyu Du, Kefan Bian, Rui Yang, Jie Cui, Yi Zhou, Rui Wang, Jinchen Yu, Rong Yu, Weiqiang Strongly Correlated Electrons In frustrated Ising magnets, classical spin liquids (CSLs) with macroscopic ground-state degeneracy can survive against conventional magnetic order, as exemplified by systems on triangular, kagome and pyrochlore lattices at zero field. Here we report the discovery of a high-field route toward spin liquids in a bilayer triangular lattice antiferromagnet, Rb$_2$Co$_2$(SeO$_3$)$_3$. We demonstrate that a cascade of CSLs -- characterized by doubly degenerate one-up-one-down local spin configurations and a residual entropy of 1/2(1-M/M_s)Rln2 per mole -- emerges through field-controlled dilution of Ising dimers. Owing to the interplay of intra- and inter-layer interactions, these CSLs are further stabilized by lattice symmetry breaking at fractional magnetization plateaus. Such field-induced spin liquids can be understood as a consequence of generalized ice rules, analogous to those governing in pyrochlore antiferromagnets. In particular, the 5/6-plateau state is a candidate quantum spin liquid. Our results thereby establish a new pathway for exploring diverse spin liquid states across both classical and quantum regimes. |
| title | Cascade of Spin Liquids in a Bilayer Triangular-lattice Antiferromagnet Rb_2Co_2(SeO_3)_3 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2604.03737 |