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首页|Evidence for spin liquid behavior in the frustrated three-dimensional $S = 1/2$ Heisenberg garnet NaCa$_{2}$Cu$_{2}$(VO$_{4}$)$_{3}$

Evidence for spin liquid behavior in the frustrated three-dimensional $S = 1/2$ Heisenberg garnet NaCa$_{2}$Cu$_{2}$(VO$_{4}$)$_{3}$

Evidence for spin liquid behavior in the frustrated three-dimensional $S = 1/2$ Heisenberg garnet NaCa$_{2}$Cu$_{2}$(VO$_{4}$)$_{3}$

来源:Arxiv_logoArxiv
英文摘要

Three-dimensional quantum spin liquids have remained elusive, hindered by reduced quantum fluctuations from larger lattice connectivity inherent to high-dimensional systems. Here, we investigate the remarkable persistence of dynamical short-range magnetic correlations in the nearly body-centered cubic garnet NaCa$_{2}$Cu$_{2}$(VO$_{4}$)$_{3}$ down to $T = 50$ mK, two orders of magnitude below its Curie-Weiss temperature. Using a combination of neutron and muon spectroscopies plus numerical simulations, we demonstrate that a dynamical regime emerges, characterized by a dual response in the inelastic spectrum composed of short-live dispersive excitations and a quasi-elastic component. Strongly frustrated exchange interactions combined with subtle temperature-dependent Jahn-Teller spin-lattice effects are a plausible mechanism to explain the origin of this spin-liquid behavior.

B. Bernu、L. Mangin-Thro、J. R. Stewart、J. M. Wilkinson、S. Bhattacharya、P. L. Paulose、F. Bert、P. Mendels、B. Fåk、E. Kermarrec、Y. Alexanian、R. Kumar、H. Zeroual

物理学

B. Bernu,L. Mangin-Thro,J. R. Stewart,J. M. Wilkinson,S. Bhattacharya,P. L. Paulose,F. Bert,P. Mendels,B. Fåk,E. Kermarrec,Y. Alexanian,R. Kumar,H. Zeroual.Evidence for spin liquid behavior in the frustrated three-dimensional $S = 1/2$ Heisenberg garnet NaCa$_{2}$Cu$_{2}$(VO$_{4}$)$_{3}$[EB/OL].(2025-07-18)[2025-08-23].https://arxiv.org/abs/2501.04653.点此复制

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