Molecular Quantum Magnetism in LiZn2Mo3O8

Abstract

Inelastic neutron scattering for temperatures below 30 K from a powder of LiZn2Mo3O8 demonstrates this triangular-lattice antiferromagnet hosts collective magnetic excitations from spin 1/2 Mo3O13 molecules. Apparently gapless (Δ< 0.2 meV) and extending at least up to 2.5 meV, the low energy magnetic scattering cross section is surprisingly broad in momentum space and involves one third of the spins present above 100 K. The data are compatible with the presence of valence-bonds involving nearest-neighbor and next-nearest-neighbor spins forming a disordered or dynamic state.

Main text: 5 pages, 4 figures. Supplementary materials: 4 pages, 4 figures, 2 tables. Accepted to PRL

References in corpus (7)

• Fractionalized excitations in the spin liquid state of a kagomé lattice antiferromagnet
• From high temperature supercondutivity to quantum spin liquid: progress in strong correlation physics
• Possible valence-bond condensation in the frustrated cluster magnet LiZn2Mo3O8
• Time-reversal-symmetry-breaking chiral spin liquids: a projective symmetry group approach of bosonic mean-field theories
• Emergent honeycomb lattice in LiZn2Mo3O8
• Fermionic spin excitations in two and three-dimensional antiferromagnets
• Magnetic Excitation in Artificially Designed Oxygen Molecule Magnet

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