Quantitative Calculation of the Spatial Extension of the Kondo Cloud

Details Quantitative Calculation of the Spatial Extension of the Kondo Cloud Quantitative Calculation of the Spatial Extension of the Kondo Cloud

2007-10-26

arxiv.org/abs/0710.5196v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.77.104401

The internal s-electron polarization in the ground state of a Friedel-Anderson and a Kondo impurity is calculated. The Wilson basis with exponentially fine energies close to the Fermi level is used and expressed in terms of free electron waves with linear energy-momentum dispersion. It is found that in the singlet state the magnetic moment of the d-electron is screened by an s-electron cloud. The linear extension of the cloud is inversely proportional to the Kondo energy. When the singlet state is destroyed the polarization cloud is absent.

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