Anderson impurity in a correlated conduction band

Abstract

We investigate the physics of a magnetic impurity with spin 1/2 in a correlated metallic host. Describing the band by a Hubbard Hamiltonian, the problem is analyzed using dynamical mean-field-theory in combination with Wilson's nonperturbative numerical renormalization group. We present results for the single-particle density of states and the dynamical spin susceptibility at zero temperature. New spectral features (side peaks) are found which should be observable experimentally. In addition, we find a general enhancement of the Kondo scale due to correlations. Nevertheless, in the metallic phase, the Kondo scale always vanishes exponentially in the limit of small hybridization.

Final version, 4 pages RevTeX, 8 eps figures included

References in corpus (4)

• Zero temperature metal-insulator transition in the infinite-dimensional Hubbard model
• Symmetric Anderson impurity model with a narrow band
• Magnetic Impurity in a Metal with Correlated Conduction Electrons: An Infinite Dimensions Approach
• Single Impurity Anderson Model with Coulomb Repulsion between Conduction Electrons on the Nearest-Neighbour Ligand Orbital

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• Charge redistribution in correlated heterostuctures within nonequilibrium real-space dynamical mean-field theory
• Field-induced local moments around nonmagnetic impurities in metallic cuprates
• Single-impurity Kondo physics at extreme particle-hole asymmetry
• Kondo Effect in a Metal with Correlated Conduction Electrons: Diagrammatic Approach
• Kondo-lattice screening in a d-wave superconductor
• Dilute magnetic moments in an exactly solvable interacting host