Dzyaloshinsky-Moriya Anisotropy in the Spin-1/2 Kagome Compound<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>ZnCu</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mi>OH</mml:mi><mml:msub><mml:mo stretchy="false">)</mml:mo><mml:mn>6</mml:mn></mml:msub><mml:msub><mml:mi>Cl</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>

Zorko, A.; Nellutla, Saritha; Tol, Johan van; Brunel, Louis‐Claude; Bert, F.; Duc, F.; Trombe, Jean‐Christian; Vries, Mark de; Harrison, Andrew; Mendels, P.

doi:10.1103/physrevlett.101.026405

Cited by 220 publications

(277 citation statements)

References 33 publications

Supporting

Mentioning

249

Contrasting

Order By: Relevance

“…2. As noted above, TDTS functions here as high-field ESR [57]. ESR linewidths are strongly sensitive to the magnitude of the off-diagonal anisotropic interactions J AEAE 1 and J zAE 1 of our model.…”

Section: B Further Constraints: Tdts Line Shapesmentioning

confidence: 99%

“…The magnetic Yb 3þ ions carry effective spin-1=2 moments in a symmetry environment allowing anisotropic exchange interactions [41,47] in the absence of antisymmetric (Dzyaloshinsky-Moriya) terms and magnetic defects, both of which are present in other two-dimensional QSL candidates such as herbertsmithite [56][57][58]. The immediate availability of single crystals [55] uncovered a QSL phenomenology in YbMgGaO 4 characterized by the absence of spin ordering or freezing down to T ¼ 100 mK in muon spin relaxation measurements [59], much lower than the Curie-Weiss temperature θ W ≈ −4 K, and a power-law behavior for the magnetic specific heat at low temperatures [55,60].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hierarchy of Exchange Interactions in the Triangular-Lattice Spin Liquid YbMgGaO4

et al. 2018

View full text Add to dashboard Cite

The spin-1=2 triangular lattice antiferromagnet YbMgGaO 4 has attracted attention recently as a quantum spin-liquid candidate with the possible presence of off-diagonal anisotropic exchange interactions induced by spin-orbit coupling. Whether a quantum spin liquid is stabilized or not depends on the interplay of various exchange interactions with chemical disorder that is inherent to the layered structure of the compound. We combine time-domain terahertz spectroscopy and inelastic neutron scattering measurements in the field-polarized state of YbMgGaO 4 to obtain better insight of its exchange interactions. Terahertz spectroscopy in this fashion functions as a high-field electron spin resonance and probes the spin-wave excitations at the Brillouin zone center, ideally complementing neutron scattering. A global spin-wave fit to all our spectroscopic data at fields over 4 T, informed by the analysis of the terahertz spectroscopy linewidths, yields constraints on the disorder-averaged g factors and exchange interactions. Our results paint YbMgGaO 4 as an easy-plane XXZ antiferromagnet with the combined and necessary presence of subleading next-nearest neighbor and weak anisotropic off-diagonal nearest-neighbor interactions. Moreover, the obtained g factors are substantially different from previous reports. This work establishes the hierarchy of exchange interactions in YbMgGaO 4 from high-field data alone and thus strongly constrains possible mechanisms responsible for the observed spin-liquid phenomenology.

show abstract

Section: B Further Constraints: Tdts Line Shapesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hierarchy of Exchange Interactions in the Triangular-Lattice Spin Liquid YbMgGaO4

et al. 2018

View full text Add to dashboard Cite

show abstract

“…For example, the Dzyaloshinskii-Moriya interaction and impurity spins may be present in the material. [25][26][27][28][29] Because of these complications, it has been difficult to pin down the true ground state of the system. These considerations also suggest that it is important to understand the effect of various perturbations to the ideal kagome lattice structure and magnetic anisotropies to identify the true ground state of the system.…”

Section: Introductionmentioning

confidence: 99%

“…Experimentally, a lot of effort has been made to realize the material system of such geometrically frustrated antiferromagnet. The Herbertsmithite [19][20][21][22][23][24]26,27 ZnCu 3 (OH) 6 Cl 2 has the most ideal structure with uniform exchange couplings and shows no magnetic ordering down to much lower temperatures than the Curie-Weiss temperature. On the other hand, there may be several additional factors that would affect the nature of the ground state.…”

Section: Introductionmentioning

confidence: 99%

Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of a spin-12deformed kagome lattice antiferromagnet

Hwang¹,

Park²,

Kim³

2012

Phys. Rev. B

View full text Add to dashboard Cite

Motivated by the recent neutron scattering experiment on Rb2Cu3SnF12 [Nat. Phys. 6, 865 (2010)], we investigate the effect of Dzyaloshinskii-Moriya interactions in a theoretical model for the magnetic structure of this material. Considering the valence bond solid ground state, which has a 12-site unit cell, we develop the bond operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya interactions significantly modify the triplon dispersions around the Γ point and cause a shift of the spin gap (the minimum triplon gap) position from the K to Γ point in the first Brillouin zone. The spin gap is also evaluated in exact diagonalization studies on a 24-site cluster. We discuss a magnetic transition induced by the Dzyaloshinskii-Moriya interactions in the bond operator framework. Moreover, the magnetization process under external magnetic fields is studied within the exact diagonalization and strong coupling expansion approaches. We find that the results of all above approaches are consistent with the experimental findings.

show abstract

“…1(b) and (c). From eSR measurements, 17 the DM vector has the magnitude D = 0.08J and is dominated by the out-of-plane component, whereas the in-plane component is small, D in = 0.01J ± 0.02J. The DM term can be gauged away by an appropriate rotation of the local spin axes, 18,19 provided that its "line integral" vanishes for any closed loop abc .…”

mentioning

confidence: 99%

Destruction of valence-bond order in aS=12sawtooth chain with a Dzyaloshinskii-Moriya term

et al. 2011

View full text Add to dashboard Cite

A small value of the spin gap in quantum antiferromagnets with strong frustration makes them susceptible to nominally small deviations from the ideal Heisenberg model. One of such perturbations, the anisotropic Dzyaloshinskii-Moriya interaction, is an important perturbation for the S = 1/2 kagome antiferromagnet, one of the current candidates for a quantum-disordered ground state. We study the influence of the DM term in a related one-dimensional system, the sawtooth chain that has valence-bond order in its ground state. Through a combination of analytical and numerical methods, we show that a relatively weak DM coupling, 0.115J, is sufficient to destroy the valence-bond order, close the spin gap, and turn the system into a Luttinger liquid with algebraic spin correlations. A similar mechanism may be at work in the kagome antiferromagnet.

show abstract

Dzyaloshinsky-Moriya Anisotropy in the Spin-1/2 Kagome CompoundZnCu3(OH)6Cl2

Cited by 220 publications

References 33 publications

Hierarchy of Exchange Interactions in the Triangular-Lattice Spin Liquid YbMgGaO4

Hierarchy of Exchange Interactions in the Triangular-Lattice Spin Liquid YbMgGaO4

Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of a spin-12deformed kagome lattice antiferromagnet

Destruction of valence-bond order in aS=12sawtooth chain with a Dzyaloshinskii-Moriya term

Contact Info

Product

Resources

About