Magnetic frustration in iridium spinel compound CuIr${}_2$S${}_4$

Abstract

We demonstrate via a muon spin rotation experiment that the electronic ground state of the iridium spinel compound, CuIr${}_2$S${}_4$, is not the presumed spin-singlet state but a novel paramagnetic state, showing a quasistatic spin glass-like magnetism below ~100 K. Considering the earlier indication that IrS${}_6$ octahedra exhibit dimerization associated with the metal-to-insulator transition below 230 K, the present result suggests that a strong spin-orbit interaction may be playing an important role in determining the ground state that accompanies magnetic frustration.

5 pages, 2 figures

References in corpus (3)

• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Kitaev-Heisenberg Model on Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides $A_2$IrO${}_3$

Cited by in corpus (8)

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• Frustrated Spin One On A Diamond Lattice
• Frustrated Magnetism in Fluoride and Chalcogenide Pyrochlore Lattice Materials
• Dimerization-Induced Fermi-Surface Reconstruction in IrTe2
• Spin-orbit coupling in octamers in a spinel sulfide CuIr${}_2$S${}_4$: Competition between spin-singlet and quadrupolar states, and its relevance to remnant paramagnetism
• Orbitally-driven insulator-metal transition in CuIr${}_2$S${}_4$: Temperature dependent transient reflectivity study
• Reexamination of the charge-ordered dimer pattern in the spinel compound CuIr2S4 using single-crystal synchrotron x-ray diffraction
• Superconductivity on the verge of metal-insulator transition in Cu${}_{1-x}$Zn${}_x$Ir${}_2$S${}_4$ probed by $\mu$SR