NMR evidence of spin supersolid and Pomeranchuk effect behaviors in the triangular-lattice antiferromagnet Rb$_2$Ni$_2$(SeO$_3$)$_3$
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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866913056225755136 |
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| author | Chen, Ying Wu, Zhanlong Gui, Xuejuan Duan, Guijing Li, Shuo Xu, Xiaoyu Du, Kefan Shi, Xinyu Bian, Rui Bo, Xiaohui Liu, Guochen Luo, Jun Yang, Jie Cui, Yi Zhou, Rui Wang, Jinchen Yu, Rong Yu, Weiqiang |
| author_facet | Chen, Ying Wu, Zhanlong Gui, Xuejuan Duan, Guijing Li, Shuo Xu, Xiaoyu Du, Kefan Shi, Xinyu Bian, Rui Bo, Xiaohui Liu, Guochen Luo, Jun Yang, Jie Cui, Yi Zhou, Rui Wang, Jinchen Yu, Rong Yu, Weiqiang |
| contents | We performed $^{85}$Rb nuclear magnetic resonance (NMR) measurements on the $S$ = 1 bilayer triangular-lattice antiferromagnet Rb$_2$Ni$_2$(SeO$_3$)$_3$ in magnetic fields up to 26 T. In the field range from 3 T to 26 T, the NMR spectral lines split and their respective spectral weight ratios reveal the existence of the magnetic up-up-down (UUD) phase, although the 1/3-plateau phase is only reached at fields above 16 T. Two distinct gapless regimes are further identified: one at low fields and low temperatures, and the other at high fields and high temperatures, consistent with the spin supersolid Y and V phases. Notably, the UUD-V phase boundary exhibits a negative slope in $dT/dH$, where the supersolid phase is located at temperatures above the solid phase due to strong low-energy spin fluctuations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_03703 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | NMR evidence of spin supersolid and Pomeranchuk effect behaviors in the triangular-lattice antiferromagnet Rb$_2$Ni$_2$(SeO$_3$)$_3$ Chen, Ying Wu, Zhanlong Gui, Xuejuan Duan, Guijing Li, Shuo Xu, Xiaoyu Du, Kefan Shi, Xinyu Bian, Rui Bo, Xiaohui Liu, Guochen Luo, Jun Yang, Jie Cui, Yi Zhou, Rui Wang, Jinchen Yu, Rong Yu, Weiqiang Strongly Correlated Electrons We performed $^{85}$Rb nuclear magnetic resonance (NMR) measurements on the $S$ = 1 bilayer triangular-lattice antiferromagnet Rb$_2$Ni$_2$(SeO$_3$)$_3$ in magnetic fields up to 26 T. In the field range from 3 T to 26 T, the NMR spectral lines split and their respective spectral weight ratios reveal the existence of the magnetic up-up-down (UUD) phase, although the 1/3-plateau phase is only reached at fields above 16 T. Two distinct gapless regimes are further identified: one at low fields and low temperatures, and the other at high fields and high temperatures, consistent with the spin supersolid Y and V phases. Notably, the UUD-V phase boundary exhibits a negative slope in $dT/dH$, where the supersolid phase is located at temperatures above the solid phase due to strong low-energy spin fluctuations. |
| title | NMR evidence of spin supersolid and Pomeranchuk effect behaviors in the triangular-lattice antiferromagnet Rb$_2$Ni$_2$(SeO$_3$)$_3$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2603.03703 |