Dynamics and thermodynamics of the spherical frustrated Blume-Emery-Griffiths model

Details Dynamics and thermodynamics of the spherical frustrated Blume-Emery-Griffiths model Dynamics and thermodynamics of the spherical frustrated Blume-Emery-Griffiths model

2003-01-31

arxiv.org/abs/cond-mat/0301621v1

Phys. Rev. E 66 (2002) 46101

Physics

Condensed Matter

Statistical Mechanics

19 pages, 8 figures

Scientific paper

10.1103/PhysRevE.66.046101

We introduce a spherical version of the frustrated Blume-Emery-Griffiths model and solve exactly the statics and the Langevin dynamics for zero particle-particle coupling (K=0). In this case the model exhibits an equilibrium transition from a disordered to a spin glass phase which is always continuous for nonzero temperature. The same phase diagram results from the study of the dynamics. Furthermore, we notice the existence of a nonequilibrium time regime in a region of the disordered phase, characterized by aging as occurs in the spin glass phase. Due to a finite equilibration time, the system displays in this region the pattern of interrupted aging.

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