Continuous phase transition in a spin-glass model without time-reversal symmetry

Details Continuous phase transition in a spin-glass model without time-reversal symmetry Continuous phase transition in a spin-glass model without time-reversal symmetry

1998-12-14

arxiv.org/abs/cond-mat/9812230v1

Physics

Condensed Matter

19 pages, Latex, 16 ps figures

Scientific paper

10.1103/PhysRevE.60.58

We investigate the phase transition in a strongly disordered short-range three-spin interaction model characterized by the absence of time reversal symmetry in the Hamiltonian. In the mean-field limit the model is well described by the Adam-Gibbs-DiMarzio scenario for the glass transition; however in the short-range case this picture turns out to be modified. The model presents a finite temperature continuous phase transition characterized by a divergent spin-glass susceptibility and a negative specific heat exponent. We expect the nature of the transition in this 3-spin model to be the same as the transition in the Edwards-Anderson model in a magnetic field, with the advantage that the strong crossover effects present in the latter case are absent.

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