Abstract
The triangular lattice compound TlYbS2 was prepared as large single crystals via a molten flux growth technique using sodium chloride. Anisotropic magnetic susceptibility measurements down to 0.4 K indicate a complete absence of long-range magnetic order. Despite this lack of long-range order, short-range antiferromagnetic interactions are evidenced through broad transitions, suggesting frustrated behavior. Variable magnetic field measurements reveal metamagnetic behavior at temperatures ≤2 K. Complex low temperature field-tunable magnetic behavior, in addition to no observable long-range order down to 0.4 K, suggest that TlYbS2 is a frustrated magnet and a possible quantum spin liquid candidate.
Highlights
The modular nature of delafossite structures allows for the possibility of differences in crystal structure as a function of the ratio of ionic radii; this has been reported to result in changes in triangular lattice layer stacking, such as ABAB stacking in the hexagonal P63/mmc or ABCABC layer stacking in the trigonal R3m
Amongst the few delafossitetype structures reported as single crystals, synthesis typically involves the use of reactive alkali fluxes, such that the alkali metal in the flux incorporates into the final product, such as the use of KCl for KErSe2 (Xing et al, 2019a) or NaCl for NaYbS2 (Baenitz et al, 2018)
For the first time large single crystals of TlYbS2 were prepared from a molten flux growth technique, and a reinvestigation of the nuclear structure was conducted
Summary
The variety of basic and applied properties arising from geometrically frustrated magnets continue to motivate the study of structures with two-dimensionally layered triangular lattices prone to antiferromagnetic interactions (Chubokov and Golosov, 1991; Lee et al, 2006; Shen et al, 2016; Li et al, 2017a; Zhu et al, 2018; Bordelon et al, 2019; Ranjith et al, 2019) Such triangular lattices restrict the number of available spin degrees of freedom, resulting in quantum fluctuations that can produce degenerate ground states (Savary and Balents, 2016). The thermometer calibration was done in zero field when the applied field was parallel with c
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