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Model C critical dynamics of disordered magnets

M. Dudka·R. Folk·Yu. Holovatch·G. Moser
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Abstract

The critical dynamics of model C in the presence of disorder is considered. It is known that in the asymptotics a conserved secondary density decouples from the nonconserved order parameter for disordered systems. However couplings between order parameter and secondary density cause considerable effects on non-asymptotic critical properties. Here, a general procedure for a renormalization group treatment is proposed. Already the one-loop approximation gives a qualitatively correct picture of the diluted model C dynamical criticality. A more quantitative description is achieved using two-loop approximation. In order to get reliable results resummation technique has to be applied.

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M. Dudka, R. Folk, Yu. Holovatch, G. Moser. 2006-01-12. Model C critical dynamics of disordered magnets. https://doi.org/10.1088/0305-4470%2F39%2F25%2Fs10

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