Metal-insulator transition in the Hubbard model: a simple description including the Kondo effect

Abstract

The electron spectrum structure in the half-filled Hubbard model is considered in terms of the one-particle Green's functions within many-electron representation. A simple analytical generalization of the single-site Hubbard-III approximation is obtained, which takes into account the Fermi excitations (Kondo terms). The problem of the metal-insulator transition is investigated. The occurrence of a three-peak density-of-states structure including the "Kondo" peak at the Fermi level is discussed. A comparison with large-d calculations is performed.

11 pages, RevTeX, 8 eps figures; extended version

References in corpus (2)

• Finite temperature numerical renormalization group study of the Mott-transition
• Critical behaviour near the metal-insulator transition of a doped Mott insulator

Cited by in corpus (6)

• Metal-Insulator Transition in the Hubbard Model: Correlations and Spiral Magnetic Structures
• Equation of Motion Solutions to Hubbard Model retaining Kondo Effect
• Spectral functions of 2D systems with coupling of electrons to collective or localized spin degrees of freedom
• A Modern Model Description of Magnetism
• A Contemporary Model Description of Magnetism
• Evolution of the spectrum and the metal-insulator transition in local approximations for many-electron models