Metal-insulator transition in the Hubbard model: a simple description including the Kondo effect
Source: The European Physical Journal B - Condensed Matter, Volume 38, Number 4, April 2004 , pp. 563-570(8)
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 in the paramagnetic phase 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.
Document Type: Research Article
Affiliations: 1: Institute of Metal Physics, S.Kovalevskay str. 18, 620219, Ekaterinburg, Russia, Email: firstname.lastname@example.org 2: Institute of Metal Physics, S.Kovalevskay str. 18, 620219, Ekaterinburg, Russia,
Publication date: April 1, 2004