Optical response of electrons in a random potential

Details Optical response of electrons in a random potential Optical response of electrons in a random potential

2004-08-12

arxiv.org/abs/cond-mat/0408265v1

Physica B 359-361, 786 (2005)

Physics

Condensed Matter

Disordered Systems and Neural Networks

2 pages, 3 figs, submitted to SCES'04

Scientific paper

10.1016/j.physb.2005.01.227

Using our recently developed Chebyshev expansion technique for finite-temperature dynamical correlation functions we numerically study the AC conductivity $\sigma(\omega)$ 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, $\omega\to 0$, by comparing with direct conductance calculations based on a Greens function approach in a Landauer B\"uttiker type setup.

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