Optical conductivity of a quasi-one-dimensional system with fluctuating orderL. Bartosch
Institut für Theoretische Physik, Universität Frankfurt Robert-Mayer-Str. 8, Postfach 111932, 60054 Frankfurt, Germany
(Received 18 August 2003; accepted 20 October 2003)
We describe a formally exact method to calculate the optical conductivity of a one-dimensional system with fluctuating order. For classical phase fluctuations we explicitly determine the optical conductivity by solving two coupled Fokker-Planck equations numerically. Our results differ considerably from perturbation theory and, in contrast to Gaussian order parameter fluctuations, show a strong dependence on the correlation length.
71.23.-k - Electronic structure of disordered solids.
71.45.Lr - Charge-density-wave systems.
72.80.-r - Conductivity of specific materials.
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