In γ-Ba₃CoNb₂O₉, a disordered cubic spin-1/2 lattice near the percolation threshold, experiments and simulations reveal a disorder-driven dynamical state with short-range correlations and no conventional freezing.
At the critical ratioJ 2/J1 = 1/4, the energyJ ⃗ qis independent ofh, giving rise to a one-dimensional manifold of degenerate ground states
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Dynamical magnetism in the disordered cubic lattice material $\gamma$-${\rm Ba}_{3}{\rm CoNb}_{2}{\rm O}_{9}$
In γ-Ba₃CoNb₂O₉, a disordered cubic spin-1/2 lattice near the percolation threshold, experiments and simulations reveal a disorder-driven dynamical state with short-range correlations and no conventional freezing.