Optical response of electrons in a random potential
Alexander Weisse, Gerald Schubert, Holger Fehske
Abstract
Using our recently developed Chebyshev expansion technique for finite-temperature dynamical correlation functions we numerically study the AC conductivity σ(ω) of the Anderson model on large cubic clusters of up to 1003 sites. Extending previous results we focus on the role of the boundary conditions and check the consistency of the DC limit, ω 0, by comparing with direct conductance calculations based on a Greens function approach in a Landauer Büttiker type setup.
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