Kondo resonance in the case of strong Coulomb screening

TL;DR

This paper investigates how strong Coulomb screening influences Kondo resonance and magnetic impurity behavior, predicting distinct resistivity responses for different occupation regimes.

Contribution

It introduces a detailed analysis of Coulomb screening effects on Kondo resonance, highlighting differences in impurity behavior based on occupation number regimes.

Findings

Distinct resistivity behaviors predicted for integer and fractional occupation regimes

Coulomb screening significantly alters magnetic impurity characteristics

Theoretical framework for analyzing screening effects in Kondo systems

Abstract

The effect of Coulomb screening on the magnetic impurity behavior is analysed. Two types of the behavior corresponding to either integer or fractional occupation numbers of the low lying magnetic level are described. The features in the dependence of the resistivity on the magnetic field specific for these regimes are predicted.