A Class of Compounds Featuring Frustrated Triangular Magnetic Lattice CsRESe${}_2$ (RE=La-Lu): Quantum Spin-Liquid Candidates

Abstract

A triangular lattice selenide series of rare earth (RE), CsRESe2, were synthesized as large single crystals using a flux growth method. This series stabilized in either trigonal (R-3m) or hexagonal (P63/mmc) crystal systems. Physical properties of CsRESe2 were explored by magnetic susceptibility and heat capacity measurements down to 0.4 K. Antiferromagnetic interaction was observed in all magnetic compounds, while no long-range magnetic order was found, indicating the frustrated magnetism. CsDySe2 presents spin freezing at 0.7 K, revealing a spin-glass state. CsCeSe2 and CsYbSe2 present broad peaks at 0.7 K and 1.5 K in the magnetization, respectively, suggesting the short-range interactions between magnetic rare earth ions. The lack of signature for long-range magnetic order and spin freezing down to 0.4 K in these compounds (RE = Ce, Yb) implies their candidacy for quantum spin liquid state.

arXiv comment4 pages, 4 figures

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• Magnetic field effects on the quantum spin liquid behaviors of NaYbS${}_2$
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• Systematic extraction of crystal electric-field effects and quantum magnetic model parameters in triangular rare-earth magnets
• Spin liquid state in a rare-earth hyperkagome lattice
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• Rare-Earth Chalcogenides: An Inspiring Playground For Exploring Frustrated Magnetism
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• Heat conduction in magnetic insulators via hybridization of acoustic phonons and spin-flip excitations
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• Magnetic anisotropy and dipolar interactions in the frustrated triangular-lattice magnet NaGdS_2