Dynamical properties of the Landau-Ginzburg model with long-range correlated quenched impurities

Details Dynamical properties of the Landau-Ginzburg model with long-range correlated quenched impurities Dynamical properties of the Landau-Ginzburg model with long-range correlated quenched impurities

1998-05-20

arxiv.org/abs/cond-mat/9805247v1

Physics

Condensed Matter

Statistical Mechanics

7 pages, REVTEX, to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.58.5153

We investigate the critical dynamics of the time-dependent Landau-Ginzburg model with non conserved n-component order parameter (Model A) in the presence of long-range correlated quenched impurities. We use a special kind of long-range correlations, previously introduced by Weinrib and Halperin. Using a double expansion in \epsilon and \delta we calculate the critical exponent z up to second order on the small parameters. We show that the quenched impurities of this kind affect the critical dynamics already in first order of \epsilon and \delta, leading to a relevant correction for the mean field value of the exponent z

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