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arXiv · 1911.12278

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

Jie Xing·Liurukara D. Sanjeewa·Jungsoo Kim·G. R. Stewart·Mao-Hua Du·Fernando A. Reboredo·Radu Custelcean·Athena S. Sefat
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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.

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Jie Xing, Liurukara D. Sanjeewa, Jungsoo Kim, G. R. Stewart, Mao-Hua Du, Fernando A. Reboredo, Radu Custelcean, Athena S. Sefat. 2019-11-27. A Class of Compounds Featuring Frustrated Triangular Magnetic Lattice CsRESe$_2$ (RE=La-Lu): Quantum Spin-Liquid Candidates. https://doi.org/10.1021/acsmaterialslett.9b00464

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