Quantum spin liquid ground state in the disorder free triangular lattice NaYbS${}_2$

Abstract

Rare-earth delafossites were recently proposed as promising candidates for the realization of an effective $S$=1/2 quantum spin liquid (QSL) on the triangular lattice. In contrast to the most actively studied triangular-lattice antiferromagnet YbMgGaO${}_4$, which is known for considerable structural disorder due to site intermixing, NaYbS${}_2$ delafossite realizes structurally ideal triangular layers. We present detailed $\mu$SR studies on this regular (undistorted) triangular Yb sublattice based system with effective spin $J_{\mathrm{eff}}=1/2$ in the temperature range 0.05 - 40 K. Zero-field (ZF) and longitudinal field (LF) $\mu$SR studies confirm the absence of any long range magnetic order state down to 0.05K ($\sim J$/80). Current $\mu$SR results together with the so far available bulk characterization data suggest that NaYbS${}_2$ is an ideal candidate to identify QSL ground state.

Submitted to PRB as Rapid communication on 18th Oct19

References in corpus (7)

• Continuous excitations of the triangular-lattice quantum spin liquid YbMgGaO4
• U(1) Gauge Theory of the Hubbard Model : Spin Liquid States and Possible Application to k-(BEDT-TTF)_2 Cu_2 (CN)_3
• $\mu$SR evidence for the U(1) quantum spin liquid ground state in the triangular antiferromagnet YbMgGaO${}_4$
• Field-induced instability of the quantum-spin-liquid ground state in the $J_{\mathrm{eff}}=\frac{1}{2}$ triangular-lattice compound NaYbO${}_2$
• $\mu$SR study of the quantum dynamics in the frustrated $S=3/2$ kagome bilayers
• Electron Spin Resonance on the spin-1/2 triangular magnet NaYbS2
• Dimer phases in quantum antiferromagnets with orbital degeneracy

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• Quantum spin state transitions in spin-1 equilateral triangular lattice antiferromagnet Na${}_2$BaNi(PO${}_4$)${}_2$
• Disorder-induced spin-liquid-like behavior in kagome-lattice compounds
• Stripe-yz magnetic order in the triangular-lattice antiferromagnet KCeS2
• Disorder-induced broadening of the spin waves in a triangular-lattice quantum-spin-liquid candidate YbZnGaO${}_4$
• Magnetic properties and signatures of moment ordering in triangular lattice antiferromagnet KCeO${}_2$
• Antiferromagnetism and crystalline-electric field excitations in tetragonal NaCeO2
• Unravelling the signatures of effective spin 1/2 moments in CeVO4: Magnetization and Heat Capacity study
• Quantum critical spin-liquid-like behavior in S = 1/2 quasikagome lattice CeRh1-xPdxSn investigated using muon spin relaxation and neutron scattering
• Néel Ordering in the Distorted Honeycomb Pyrosilicate: C-Er${}_2$Si${}_2$O${}_7$
• Effects of the Crystalline Electric Field in the $KErT{e}_2$ Quantum Spin Liquid Candidate
• Universal fluctuating regime in triangular chromate antiferromagnets