Disorder screening near the Mott-Anderson transition

Details Disorder screening near the Mott-Anderson transition Disorder screening near the Mott-Anderson transition

2007-04-03

arxiv.org/abs/0704.0450v1

Physica B 403, 1417 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 3 figures, submitted to SCES proceedings

Scientific paper

10.1016/j.physb.2007.10.213

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

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