Field-induced instability of the quantum spin liquid ground state in the 
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 triangular-lattice compound 
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Ranjith, K. M.; Dmytriieva, D.; Khim, Seunghyun; Sichelschmidt, J.; Luther, S.; Ehlers, D.; Yaśuoka, Hiroshi; Wosnitza, J.; Tsirlin, Alexander A.; Kühne, H.; Baenitz, M.

doi:10.1103/physrevb.99.180401

Cited by 125 publications

(145 citation statements)

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“…Low field studies reveal a QSL ground state with gapless excitations for both NaYbS 2 and NaYbO 2 . In the case of NaYbO 2 , upon applying the external magnetic fields, this QSL state becomes unstable and it shows magnetic long range ordering above µ 0 H 2 T. This field-induced magnetic ordering of NaYbO 2 is well confirmed by the magnetization, heat capacity, and neutron diffraction measurements [7,9].…”

Section: Introductionmentioning

confidence: 57%

“…At temperatures considerably lower than the energy gap ∆ between the ground state and the first excited state doublet, the magnetic properties can be described by an effective spin-1 2 local moment. The values of ∆ are found to be ∼ 200, ∼400, and ∼ 180 K for NaYbS 2 [6,17], NaYbO 2 [7,8], and NaYbSe 2 [11,16], respectively. Low field studies reveal a QSL ground state with gapless excitations for both NaYbS 2 and NaYbO 2 .…”

Section: Introductionmentioning

confidence: 94%

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Magnetic Properties of an Effective Spin-\(\frac{1}{2}\) Triangular-Lattice Compound LiYbS₂

Ranjith

Schlender

Doert

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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Here, we report the synthesis and magnetic properties of a Yb-based triangular-lattice compound LiYbS 2 . At low temperatures, it features an effective spin-1 2 state due to the combined effect of crystal electric field and spin orbit coupling. Magnetic susceptibility measurements and 7 Li nuclear magnetic resonance experiments reveal the absence of magnetic long range ordering down to 2 K, which suggests a possible quantum spin liquid ground state. A dominant antiferromagnetic nearest neighbour exchange interaction J/k B 5.3 K could be extracted form the magnetic susceptibility. The NMR linewidth analysis yields the coupling constant between the Li nuclei and Yb 3+ ions which was found to be purely dipolar in nature.

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Section: Introductionmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 94%

Magnetic Properties of an Effective Spin-\(\frac{1}{2}\) Triangular-Lattice Compound LiYbS₂

Ranjith

Schlender

Doert

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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“…Here, the combination of the SOC and the crystal electric field (CEF) leads to a Kramers doublet ground state for the Yb 3+ ion, so that the low temperature properties can be described by an effective spin- 1 2 Hamiltonian. The energy gap between the ground state and the first excited doublet was found to be ∆/k B ∼ 200 and ∼400 K for NaYbS 2 [39] and NaYbO 2 [40,41], respectively, which suggests an effective spin-1 2 ground state. Experimentally, this is confirmed by specific heat measurements, which reveal a magnetic entropy of Rln (2) per Yb 3+ ion [39,40].…”

mentioning

confidence: 92%

“…The energy gap between the ground state and the first excited doublet was found to be ∆/k B ∼ 200 and ∼400 K for NaYbS 2 [39] and NaYbO 2 [40,41], respectively, which suggests an effective spin-1 2 ground state. Experimentally, this is confirmed by specific heat measurements, which reveal a magnetic entropy of Rln (2) per Yb 3+ ion [39,40]. Zero-field µSR and heat capacity measurements down to 50 mK confirmed the absence of magnetic long-range order (LRO), and suggested a QSL ground state with gapless excitations for NaYbS 2 and NaYbO 2 [39][40][41].…”

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confidence: 92%

Anisotropic field-induced ordering in the triangular-lattice quantum spin liquid NaYbSe2

et al. 2019

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High-quality single crystals of NaYbSe2, which resembles a perfect triangular-lattice antiferromagnet without the intrinsic disorder, are investigated by magnetization and specific-heat, as well as the local probe techniques nuclear magnetic resonance (NMR) and electron spin resonance (ESR). The low-field measurements confirm the absence of any spin freezing or long-range magnetic order down to 50 mK, which suggests a quantum spin liquid ground (QSL) state with gapless excitations. Instability of the QSL state is observed upon applying magnetic fields. For the H⊥c direction, a field-induced magnetic phase transition is observed above 2 T from the Cp(T ) data, agreeing with a clear Ms 3 plateau of M (H), which is associated with an up-up-down (uud) spin arrangement. For the H c direction, a field-induced transition could be evidenced at a much higher field range (9 -21 T). The 23 Na NMR measurements provide microscopic evidence for field-induced ordering for both directions. A reentrant behaviour of TN, originating from the thermal and quantum spin fluctuations, is observed for both directions. The anisotropic exchange interactions J ⊥ 4.7 K and Jz 2.33 K are extracted from the modified bond-dependent XXZ model for the spin-1 2 triangular-lattice antiferromagnet. The absence of magnetic long-range order at zero fields is assigned to the effect of strong bond-frustration, arising from the complex spin-orbit entangled 4f ground state. Finally, we derive the highly anisotropic magnetic phase diagram, which is discussed in comparison with the existing theoretical models for spin-1 2 triangular-lattice antiferromagnets. :1911.12712v1 [cond-mat.str-el] arXiv

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“…= √ ( + 1) (1) Based on the success of the analysis used for NaYbS2, a similar method was employed for TlYbS2 to understand the low temperature magnetic moment. Within the triangular lattice Heisenberg AFM model, the magnetization should plateau at approximately 1/3 the expected saturation magnetization, according to equation (2). In this equation, the saturation magnetization = • (2) (ms) is equal to the product of the g-factor and the total angular momentum (J).…”

Section: Magnetic Susceptibilitymentioning

confidence: 99%

Frustrated Magnetism in Triangular Lattice TlYbS2 Crystals Grown via Molten Flux

et al. 2020

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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. [25][26][27][28][29][30][31][32][33] Recently, Yb(III) containing compounds such as NaYbO2, 1, 2 NaYbS2, 9 and YbMgGaO4 4,10,11,13,34 have been presented as QSL candidates, all crystallizing in a layered triangular lattice of trigonal space group R-3m. Due to the odd number of 4f electrons and strong SOC, these materials behave as effective spin Jeff = ½. A similar family of 4f-containing delafossites, of the general formula A(I)Ln(III)Ch(II) [A = Na, Rb, K; Ch = O, S, Se, Te], 31 has also been proposed as a

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Field-induced instability of the quantum spin liquid ground state in the Jeff=12 triangular-lattice compound NaYbO2

Cited by 125 publications

References 59 publications

Magnetic Properties of an Effective Spin-\(\frac{1}{2}\) Triangular-Lattice Compound LiYbS₂

Magnetic Properties of an Effective Spin-\(\frac{1}{2}\) Triangular-Lattice Compound LiYbS₂

Anisotropic field-induced ordering in the triangular-lattice quantum spin liquid NaYbSe2

Frustrated Magnetism in Triangular Lattice TlYbS2 Crystals Grown via Molten Flux

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Field-induced instability of the quantum spin liquid ground state in the Jeff=12 triangular-lattice compound NaYbO2

Cited by 125 publications

References 59 publications

Magnetic Properties of an Effective Spin-\(\frac{1}{2}\) Triangular-Lattice Compound LiYbS2

Magnetic Properties of an Effective Spin-\(\frac{1}{2}\) Triangular-Lattice Compound LiYbS2

Anisotropic field-induced ordering in the triangular-lattice quantum spin liquid NaYbSe2

Frustrated Magnetism in Triangular Lattice TlYbS2 Crystals Grown via Molten Flux

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Magnetic Properties of an Effective Spin-\(\frac{1}{2}\) Triangular-Lattice Compound LiYbS₂

Magnetic Properties of an Effective Spin-\(\frac{1}{2}\) Triangular-Lattice Compound LiYbS₂