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Dun, Zhiling; Trinh, Jennifer; Lee, Minseong; Choi, Eun Sang; Li, K.; Hu, Yufei; Wang, Y. X.; Blanc, Nicolas; Ramirez, A. P.; Zhou, H. D.

doi:10.1103/physrevb.95.104439

Cited by 45 publications

(74 citation statements)

References 62 publications

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“…From the structure of the integral we infer that f (β∆) is even, and that it is non singular at β∆ = 0. In fact f (0) = π 4 15 . Hence we can always expand f as a power series in ∆β around ∆β = 0 and drop higher order terms in a high temperature (small β) approximation.…”

Section: A High Temperature Expansion Of Heat Capacitymentioning

confidence: 99%

Homogeneous reduced moment in a gapful scalar chiral kagome antiferromagnet

et al. 2019

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We present present a quantitative experimental investigation of the scalar chiral magnetic order with in Nd3Sb3Mg2O14. Static magnetization reveals a net ferromagnetic ground state, and inelastic neutron scattering from the hyperfine coupled nuclear spin reveals a local ordered moment of 1.76(6) µB, just 61(2)% of the saturated moment size. The experiments exclude static disorder as the source of the reduced moment. A 38(1) µeV gap in the magnetic excitation spectrum inferred from heat capacity rules out thermal fluctuations and suggests a multipolar explanation for the moment reduction. We compare Nd3Sb3Mg2O14 to Nd pyrochlores and show that it is close to a moment fragmented state.

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Section: A High Temperature Expansion Of Heat Capacitymentioning

confidence: 99%

Homogeneous reduced moment in a gapful scalar chiral kagome antiferromagnet

et al. 2019

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“…Of particular interest there would be the possibility of investigating how the relaxation time scales and glassy behavior may be affected by quantum dynamics. Finally, (layered) kagome spin lattices occur in solid-state materials and can be combined with the crystal-field physics of rare-earth ions to achieve the desired easy-axis (Ising) nature and leading dipolar interactions [14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Supercooling and fragile glassiness in a dipolar kagome Ising magnet

2018

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We study equilibration and ordering in the classical dipolar kagome Ising antiferromagnet, which we show behaves as a disorder-free fragile spin glass. By identifying an appropriate order parameter, we demonstrate a transition to the ordered state proposed by Chioar et al. [Phys. Rev. B 93, 214410 (2016)] with a 12-site unit cell that breaks time-reversal and sublattice symmetries, and further provide evidence that the nature of the transition is first order. Upon approaching the transition, the spin dynamics slow dramatically. The system readily falls out of equilibrium, overshooting the transition and entering a supercooled liquid regime. Using extensive Monte Carlo simulations, we show that the system exhibits super-Arrhenius behavior above the ordering transition. The best fit to the relaxation time is of the Vogel-Fulcher form with a divergence at a finite "glass transition" temperature in the supercooled regime. Such behavior, characteristic of fragile glasses, is particularly remarkable as the model is free of quenched disorder, does not straightforwardly conform to the avoided criticality paradigm, and is simple and eminently realizable in engineered nanomagnetic arrays.

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“…In the last decade or so, an increasing number of new materials have been proposed to be QSL candidates. These spin liquid candidates often have the lattice structures with geometric frustration such as triangle lattice (κ-[ET] 2 Cu 2 (CN) 3 5-11 Recently, a new family of pyrochlore derivatives RE 3 Sb 3 M 2 O 14 (RE = La, Pr, Nd, Gd, Tb, Dy, Ho, Er, and Yb; M = Mg, Zn) with a kagomé lattice structure was discovered, and their crystal structure, thermal transport, and magnetic properties were studied [55][56][57][58][59][60] . In these materials, the rare-earth ions form two-dimensional kagomé lattice layers that are separated by non-magnetic Zn/Mg layer.…”

Section: Introductionmentioning

confidence: 99%

Possible gapless spin liquid in the rare-earth kagome lattice magnet Tm3Sb3Zn2O14

et al. 2018

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We report the thermodynamic and muon spin relaxation (µSR) evidences for a possible gapless spin liquid in Tm3Sb3Zn2O14, with the rare-earth ions Tm 3+ forming a two-dimensional kagomé lattice. We extract the magnetic specific heat of Tm3Sb3Zn2O14 by subtracting the phonon contribution of the non-magnetic isostructural material La3Sb3Zn2O14 and obtain a clear linear-T temperature dependence of magnetic specific heat at low temperatures. No long-range magnetic order was observed down to 0.35 K in the heat capacity measurements, and no signature of spin freezing down to 50 mK was observed in A.C. susceptibility measurements. The absence of magnetic order is further confirmed by the µSR measurements down to 20 mK. We find that the spinlattice relaxation time remains constant down to the lowest temperature. We point out that the physics in Tm3Sb3Zn2O14 is fundamentally different from the Cu-based herbertsmithite and propose spin liquid ground states with non-Kramers doublets on the kagomé lattice to account for the experimental results. However, we can not rule out that these exotic properties are induced by the Tm/Zn site-mixing disorder in Tm3Sb3Zn2O14.

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Structural and magnetic properties of two branches of the tripod-kagome-lattice familyA2R3Sb3O14(A

Cited by 45 publications

References 62 publications

Homogeneous reduced moment in a gapful scalar chiral kagome antiferromagnet

Homogeneous reduced moment in a gapful scalar chiral kagome antiferromagnet

Supercooling and fragile glassiness in a dipolar kagome Ising magnet

Possible gapless spin liquid in the rare-earth kagome lattice magnet Tm3Sb3Zn2O14

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