Long-range magnetic order in the $\tilde{S}=1/2$ triangular lattice antiferromagnet KCeS${}_2$

Abstract

Recently, several putative quantum spin liquid (QSL) states were discovered in $\tilde{S}=1/2$ rare-earth based triangular-lattice antiferromagnets (TLAF) with the delafossite structure. A way to clarify the origin of the QSL state in these systems is to identify ways to tune them from the putative QSL state towards long-range magnetic order. Here, we introduce the Ce-based TLAF KCeS${}_2$ and show via low-temperature specific heat and $\mu$SR investigations that it yields magnetic order below $T_{\mathrm{N}}=0.38$ K despite the same delafossite structure. We identify a well separated $\tilde{S}=1/2$ ground state for KCeS${}_2$ from inelastic neutron scattering and embedded-cluster quantum chemical calculations. Magnetization and electron spin resonance measurements on single crystals indicate a strong easy-plane $g$~factor anisotropy, in agreement with the ab initio calculations. Finally, our specific-heat studies reveal an in-plane anisotropy of the magnetic field-temperature phase diagram which may indicate anisotropic magnetic interactions in KCeS${}_2$.

arXiv commentsubmission to Scipost Physics

References in corpus (33)

• Non-Abelian Anyons and Topological Quantum Computation
• Mantid - Data Analysis and Visualization Package for Neutron Scattering and $\mu SR$ Experiments
• musrfit: A free platform-independent framework for muSR data analysis
• Rare-earth triangular lattice spin liquid: a single-crystal study of YbMgGaO${}_4$
• Gapless quantum spin liquid ground state in the two-dimensional spin-1/2 triangular antiferromagnet YbMgGaO${}_4$
• Spin liquid nature in the Heisenberg $J_1$-$J_2$ triangular antiferromagnet
• Spin liquid phase of the $S=\frac{1}{2}$ $J_1-J_2$ Heisenberg model on the triangular lattice
• Field-tunable quantum disordered ground state in the triangular lattice antiferromagnet NaYbO${}_2$
• Competing Spin Liquid States in the Spin-$1/2$ Heisenberg Model On Triangular Lattice
• Rare-earth chalcogenides: A large family of triangular lattice spin liquid candidate
• Crystalline Electric Field Randomness in the Triangular Lattice Spin-Liquid YbMgGaO${}_4$
• NaYbS${}_2$ - a new planar spin-$\frac{1}{2}$ triangular-lattice magnet and putative spin liquid
• Gapless spin-liquid state in the structurally disorder-free triangular antiferromagnet NaYbO${}_2$
• An anisotropic spin model of strong spin-orbit-coupled triangular antiferromagnets
• Anisotropic field-induced ordering in the triangular-lattice quantum spin liquid NaYbSe${}_2$
• Topography of Spin Liquids on a Triangular Lattice
• Field-induced instability of the quantum-spin-liquid ground state in the $J_{\mathrm{eff}}=\frac{1}{2}$ triangular-lattice compound NaYbO${}_2$
• Quantum Spin Ice Dynamics in the Dipole-Octupole Pyrochlore Magnet Ce${}_2$Zr${}_2$O${}_7$
• Frustration and anisotropic exchange in ytterbium magnets with edge-shared octahedra
• Anisotropic-Exchange Magnets on a Triangular Lattice: Spin Waves, Accidental Degeneracies, and Dual Spin Liquids
• Quantum spin liquid ground state in the disorder free triangular lattice NaYbS${}_2$
• Field-induced magnetic transition and spin fluctuation in quantum spin liquid candidate CsYbSe${}_2$
• A Class of Compounds Featuring Frustrated Triangular Magnetic Lattice CsRESe${}_2$ (RE=La-Lu): Quantum Spin-Liquid Candidates
• Spin liquids in geometrically perfect triangular antiferromagnets
• Spin excitations in the frustrated triangular lattice antiferromagnet NaYbO${}_2$
• Hierarchy of exchange interactions in the triangular-lattice spin-liquid YbMgGaO${}_4$
• Spin Liquid versus Spin Orbit Coupling on the Triangular Lattice
• Quantum order by disorder in the Kitaev model on a triangular lattice
• Single-site magnetic anisotropy governed by inter-layer cation charge imbalance in triangular-lattice AYbX${}_2$
• Crystalline electric field of Ce in trigonal symmetry: CeIr3Ge7 as a model case
• The two-dimensional metallic triangular lattice antiferromagnet CeCd3P3
• NMR study of the spin excitations in the frustrated antiferromagnet Yb(BaBO${}_3$)${}_3$ with a triangular lattice
• Effective Spin-1/2 Moments on a Yb${}^{3+}$ Triangular Lattice: an ESR Study

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