First-order transitions and triple point on a random p-spin interaction model
Abstract
The effects of competing quadrupolar- and spin-glass orderings are investigated on a spin-1 Ising model with infinite-range random p-spin interactions. The model is studied through the replica approach and a phase diagram is obtained in the limit p∞. The phase diagram, obtained within replica-symmetry breaking, exhibits a very unusual feature in magnetic models: three first-order transition lines meeting at a commom triple point, where all phases of the model coexist.
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