Autocorrelation functions in 3D fully frustrated systems

We present a numerical study of autocorrelation functions of a 3D fully frustrated Ising model (FFIM) simulated by spin-flip Monte-Carlo dynamics finding simple exponential decay for all the temperature above the critical temperature Tc for the autocorrelation of squared magnetization and stretched exponential decay for the energy autocorrelation below a temperature T* with View the MathML source where Tp is the Kasteleyn-Fortuin and Coniglio-Klein percolation temperature. The results are compared to those on 2D FFIM to make light on the relevant mechanism in the onset of stretched exponential relaxation functions.