Disorder screening near the Mott-Anderson transition
arXiv:0704.0450 · doi:10.1016/j.physb.2007.10.213
Abstract
Correlation-driven screening of disorder is studied within the typical-medium dynamical mean-field theory (TMT-DMFT) of the Mott-Anderson transition. In the strongly correlated regime, the site energies epsilon_R^i characterizing the effective disorder potential are strongly renormalized due to the phenomenon of Kondo pinning. This effect produces very strong screening when the interaction U is stronger then disorder W, but applies only to a fraction of the sites in the opposite limit (U<W).
2 pages, 3 figures, submitted to SCES proceedings