Optical response of electrons in a random potential

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 100 3 sites. Extending previous results, we focus on the role of the boundary con...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2005-04, Vol.359, p.786-788
Main Authors: Weiße, Alexander, Schubert, Gerald, Fehske, Holger
Format: Article
Language:English
Subjects:
Anderson localisation
Chebyshev expansion
Quantum transport
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Summary: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 100 3 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.
ISSN:0921-4526
DOI:10.1016/j.physb.2005.01.227