Giant Magnetoelastic-Coupling Driven Spin-Lattice Liquid State in Molybdate Pyrochlores

Abstract

We propose the idea of a spin-lattice liquid, in which spin and lattice degrees of freedom are strongly coupled and remain disordered and fluctuating down to low temperatures. We show that such a state arises naturally from a microscopic analysis of a class of molybdate pyrochlore compounds, and is driven by a giant magnetoelastic effect. Finally, we argue that this could explain some of the experimental features of Y${}_2$Mo${}_2$O${}_7$.

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• Fragmentation in Frustrated Magnets -- A review
• Strain tuning of highly frustrated magnets: Order and disorder in the distorted kagome Heisenberg antiferromagnet
• Electronic structure of the frustrated diamond lattice magnet NiRh${}_2$O${}_4$
• Supercooled Jahn-Teller Ice
• Replica theory for disorder-free spin-lattice glass transition on a tree-like simplex network
• Quantum valence bond ice theory for proton-driven quantum spin-dipole liquids
• Metal-insulator transitions in pyrochlore oxides
• Robust noncoplanar magnetism in band filling-tuned (Nd${}_{1-x}$Ca${}_x$)${}_2$Mo${}_2$O${}_7$
• Hidden Frustration in Double-Perovskite CaFeTi${}_2$O${}_6$