Date of Original Version
The dynamics of the classical two-sublattice XYZ model with uniform intersublattice interaction and zero intrasublattice interaction is completely integrable for arbitrary system sizes. This makes the system amenable to an exact analysis of dynamic correlation functions. Here we present some exact results for the case with isotropic interaction (XXX model). The dynamical properties of the two-sublattice XYZ model are compared with those of the equivalent-neighbor XYZ model and categorized into universality classes of dynamical behavior.
Liu, J. M., & Muller, G. (1991). Dynamics of an integrable two-sublattice spin model with long-range interaction. Physical Review B, 44(21), 12020-12022. doi: 10.1103/PhysRevB.44.12020
Available at: http://dx.doi.org/10.1103/PhysRevB.44.12020