Spin-1/2 kagome compounds: volborthite vs herbertsmithite

Abstract

Two kagome compounds, volborthite Cu3V2O7(OH)2-2H2O and herbertsmithite ZnCu3(OH)6Cl2, are compared in order to derive information about the intrinsic properties of the spin-1/2 kagome antiferromagnet. Volborthite shows a broad maximum at T ~ J / 4 and the approach at T = 0 to a large finite value of the bulk magnetic susceptibility chi_bulk as well as the local susceptibility chi_local from NMR measurements. These must be intrinsic properties for the spin-1/2 kagome antiferromagnet, as similar behavior has also been reported in chi_local for herbertsmithite [Olariu A et al. 2008 Phys. Rev. Lett., 100 087202]. Impurity effects that may significantly influence the bulk properties are discussed.

8 pages, to be published in J. Phys.: Conf. Series; Proc. of HFM2008

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Cited by in corpus (11)

• Gapless quantum spin liquid ground state in the two-dimensional spin-1/2 triangular antiferromagnet YbMgGaO${}_4$
• Magnetism of the N=42 kagome lattice antiferromagnet
• Re-entrance of Gapless Quantum Spin Liquids Observed in a Newly Synthesized Spin-1/2 Kagome Antiferromagnet $ZnC{u}_3(OH{)}_{6}S{O}_4$
• Emergent Potts order in the kagomé $J_1-J_3$ Heisenberg model
• Structure factor of low-energy spin excitations in a S=1/2 kagome antiferromagnet
• Thermodynamics of the kagome-lattice Heisenberg antiferromagnet with arbitrary spin $S$
• Destruction of valence-bond order in a $S=1/2$ sawtooth chain with a Dzyaloshinskii-Moriya term
• Doping on the kagome lattice: A variational Monte-Carlo study of the $t-J$ model
• Competing emergent Potts orders and possible nematic spin liquids in the Kagome $J_1-J_3$ Heisenberg model
• Dynamical coupling of dilute magnetic impurities with quantum spin liquid state in the S = 3/2 dimer compound Ba3ZnRu2O9
• Spinon mediation of witness spin dynamics in herbertsmithite