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Dynamical ac study of the critical behavior in Heisenberg spin glasses
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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 $\tau\sim (T-T_c)^{-z\nu}$ with $T_c=0.19(4)$ and $z\nu=5.0(5)$. 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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PICCO, Marco and RITORT FARRAN, Fèlix. Dynamical ac study of the critical behavior in Heisenberg spin glasses. Physical Review B. 2005. Vol. 71, num. 10, pags. 100406-1-100406-4. ISSN 0163-1829. [consulted: 22 of May of 2026]. Available at: https://hdl.handle.net/2445/10921