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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.23350 |
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| _version_ | 1866911541763244032 |
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| author | Khatua, J. Kim, Taeyun Murugan, G. Senthil Kumawat, S. M. Huang, C. -L. Oshima, Yugo Nojiri, Hiroyuki Morris, Gerald Dunsiger, Sarah R. Kim, Heung-Sik Sritharan, K. Mani, Shankar Sankar, R. Choi, Kwang-Yong |
| author_facet | Khatua, J. Kim, Taeyun Murugan, G. Senthil Kumawat, S. M. Huang, C. -L. Oshima, Yugo Nojiri, Hiroyuki Morris, Gerald Dunsiger, Sarah R. Kim, Heung-Sik Sritharan, K. Mani, Shankar Sankar, R. Choi, Kwang-Yong |
| contents | Star lattice, which can be visualized as a honeycomb network with each vertex replaced by a triangle, provides a rare platform for realizing exotic quantum states such as quantum spin liquids and disorder-driven random-singlet (RS) states. Herein, we investigate the ground-state properties of the three-dimensional (3D) stuffed hyper-star lattice Li$_2$Cu$_2$(MoO$_4$)$_3$, which exhibits a crossover from short-range spin correlations to a disorder-driven RS-like state below $T^{*}\sim$15.8 K. Thermodynamic and microscopic measurements capture this crossover through a change in the power-law behavior of various observables, from $\sim T^{0.25}$ for $T > T^{*}$ to $\sim T^{-0.50}$ for $T < T^{*}$. Upon further cooling, a quasi-frozen state emerges near $T_{\rm f} = 0.32$ K, likely associated with weakly coupled spin chains within the hyper-star spin network. Our results underscore the crucial role of orphan spins and weak residual interactions in stabilizing a disorder-driven quantum-disordered state in 3D. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_23350 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Multistage spin correlations in the $s$ = 1/2 stuffed hyper-star lattice Li$_{2}$Cu$_{2}$(MoO$_{4}$)$_{3}$ Khatua, J. Kim, Taeyun Murugan, G. Senthil Kumawat, S. M. Huang, C. -L. Oshima, Yugo Nojiri, Hiroyuki Morris, Gerald Dunsiger, Sarah R. Kim, Heung-Sik Sritharan, K. Mani, Shankar Sankar, R. Choi, Kwang-Yong Strongly Correlated Electrons Star lattice, which can be visualized as a honeycomb network with each vertex replaced by a triangle, provides a rare platform for realizing exotic quantum states such as quantum spin liquids and disorder-driven random-singlet (RS) states. Herein, we investigate the ground-state properties of the three-dimensional (3D) stuffed hyper-star lattice Li$_2$Cu$_2$(MoO$_4$)$_3$, which exhibits a crossover from short-range spin correlations to a disorder-driven RS-like state below $T^{*}\sim$15.8 K. Thermodynamic and microscopic measurements capture this crossover through a change in the power-law behavior of various observables, from $\sim T^{0.25}$ for $T > T^{*}$ to $\sim T^{-0.50}$ for $T < T^{*}$. Upon further cooling, a quasi-frozen state emerges near $T_{\rm f} = 0.32$ K, likely associated with weakly coupled spin chains within the hyper-star spin network. Our results underscore the crucial role of orphan spins and weak residual interactions in stabilizing a disorder-driven quantum-disordered state in 3D. |
| title | Multistage spin correlations in the $s$ = 1/2 stuffed hyper-star lattice Li$_{2}$Cu$_{2}$(MoO$_{4}$)$_{3}$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2603.23350 |