Charge-density oscillations in intermediate-valence and Kondo systems

Spatial variation of conduction-electron charge-density perturbation around 3d or 4f impurities in normal metals is investigated within the single-orbital Anderson model. Using the perturbation theory we calculate δ${\rho }_c$(r,T) in various points of the parameter space. The Kondo region, the valence-fluctuating region, and the nearly-empty-orbital region are discussed. We also discuss the relevance of our results for the explanation of the experimentally observed features of charge-density oscillations in some dilute alloys.