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Kondo screening and exhaustion in the periodic Anderson model

D. Meyer·W. Nolting
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Abstract

We investigate the paramagnetic periodic Anderson model using the dynamical mean-field theory in combination with the modified perturbation theory which interpolates between the weak and strong coupling limits. For the symmetric PAM, the ground state is always a singlet state. However, as function of the hybridization strength, a crossover from collective to local Kondo screening is found. Reducing the number of conduction electrons, the local Kondo singlets remain stable. The unpaired f-electrons dominate the physics of the system. For very low conduction electron densities, a large increase of the effective mass of the quasiparticles is visible, which is interpreted as the approach of the Mott-Hubbard transition.

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D. Meyer, W. Nolting. 2000-03-01. Kondo screening and exhaustion in the periodic Anderson model. https://doi.org/10.1103/physrevb.61.13465

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