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Dynamical AC study of the critical behavior in Heisenberg spin glasses

Marco Picco·Felix Ritort
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Abstract

We present some numerical results for the Heisenberg spin-glass model with Gaussian interactions, in a three dimensional cubic lattice. We measure the AC susceptibility as a function of temperature and determine an apparent finite temperature transition which is compatible with the chiral-glass temperature transition for this model. The relaxation time diverges like a power law $τ\sim (T-T_c)^{-zν}$ with $T_c=0.19(4)$ and $zν=5.0(5)$. Although our data indicates that the spin-glass transition occurs at the same temperature as the chiral glass transition, we cannot exclude the possibility of a chiral-spin coupling scenario for the lowest frequencies investigated.

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Marco Picco, Felix Ritort. 2004-05-14. Dynamical AC study of the critical behavior in Heisenberg spin glasses. https://doi.org/10.1103/physrevb.71.100406

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