Dynamical AC study of the critical behavior in Heisenberg spin glasses

Details Dynamical AC study of the critical behavior in Heisenberg spin glasses Dynamical AC study of the critical behavior in Heisenberg spin glasses

2004-05-14

arxiv.org/abs/cond-mat/0405308v1

Physical Review B 71 (2005) 100406

Physics

Condensed Matter

Other Condensed Matter

7 pages, 4 figures

Scientific paper

10.1103/PhysRevB.71.100406

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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