Non exponential relaxation in fully frustrated models

Details Non exponential relaxation in fully frustrated models Non exponential relaxation in fully frustrated models

1997-10-27

arxiv.org/abs/cond-mat/9710279v1

Phys. Rev. E 56, 4990 (1997)

Physics

Condensed Matter

Statistical Mechanics

7 pages, RevTeX, 11 figs, to appear on Physical Review E

Scientific paper

10.1103/PhysRevE.56.4990

We study the dynamical properties of the fully frustrated Ising model. Due to the absence of disorder the model, contrary to spin glass, does not exhibit any Griffiths phase, which has been associated to non-exponential relaxation dynamics. Nevertheless we find numerically that the model exhibits a stretched exponential behavior below a temperature T_p corresponding to the percolation transition of the Kasteleyn-Fortuin clusters. We have also found that the critical behavior of this clusters for a fully frustrated q-state spin model at the percolation threshold is strongly affected by frustration. In fact while in absence of frustration the q=1 limit gives random percolation, in presence of frustration the critical behavior is in the same universality class of the ferromagnetic q=1/2-state Potts model.

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