
TL;DR
This paper generalizes the Drude model to include anomalous diffusion and long-tailed collision times, providing insights into electronic transport in quasicrystals with complex scaling laws.
Contribution
It introduces a generalized Drude model allowing sub- or superdiffusive particle motion and long-tailed collision time distributions, expanding understanding of anomalous electronic transport.
Findings
Anomalous diffusion coefficients exhibit complex scaling laws.
Conductivity can be computed in the diffusive regime.
Model applicable to electronic transport in quasicrystals.
Abstract
A generalization of the Drude model is studied. On the one hand, the free motion of the particles is allowed to be sub- or superdiffusive; on the other hand, the distribution of the time delay between collisions is allowed to have a long tail and even a non-vanishing first moment. The collision averaged motion is either regular diffusive or L\'evy-flight like. The anomalous diffusion coefficients show complex scaling laws. The conductivity can be calculated in the diffusive regime. The model is of interest for the phenomenological study of electronic transport in quasicrystals.
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