Synthesis and anisotropic magnetism in quantum spin liquid candidates AYbSe2 (A = K and Rb)

Xing, Jie; Sanjeewa, Liurukara D.; May, Andrew F.; Sefat, Athena S.

doi:10.1063/5.0071161

Title: Synthesis and anisotropic magnetism in quantum spin liquid candidates AYbSe₂ (A = K and Rb)

Journal Article · 08 November 2021 · APL Materials

DOI: https://doi.org/10.1063/5.0071161 · OSTI ID:1842583

^[1]; Sanjeewa, Liurukara D. ^[2];

^[1]; Sefat, Athena S. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Missouri, Columbia, MO (United States)

The quantum spin liquid (QSL) state in rare-earth triangular lattices has attracted much attention recently due to its potential application in quantum computing and communication. Here, we report the single-crystal growth synthesis, crystal structure characterizations, and magnetic properties of AYbSe₂ (A = K and Rb) compounds. The x-ray diffraction analysis shows that AYbSe₂ (A = K and Rb) crystallizes in a trigonal space group, R-3m (No. 166) with Z = 3. AYbSe₂ possesses a two-dimensional (2D) Yb–Se–Yb layered structure formed by edged-shared YbSe₆ octahedra. The magnetic properties are highly anisotropic for both title compounds, and no long-range order is found down to 0.4 K, revealing the possible QSL ground state in these compounds. The isothermal magnetization exhibits a one-third magnetization plateau when the magnetic fields are applied in the ab-plane. Heat capacity is performed along both ab-plane and c axis and features the characteristic dome for triangular magnetic lattice compounds as a function of magnetic fields. Due to the change in the interlayer and intralayer distance of Yb³⁺, the dome shifts to low fields from KYbSe₂ to RbYbSe₂. All these results indicate that the AYbSe₂ family presents unique frustrated magnetism close to the possible QSL and noncollinear spin states.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1842583

Journal Information:: APL Materials, Journal Name: APL Materials Journal Issue: 11 Vol. 9; ISSN 2166-532X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Synthesis and anisotropic magnetism in quantum spin liquid candidates AYbSe₂ (A = K and Rb)