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

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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.

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Authors and Affiliations

  1. Institute of Metal Physics, S.Kovalevskay str. 18, 620219, Ekaterinburg, Russia

    V. Yu. Irkhin & A. V. Zarubin

Authors
  1. V. Yu. Irkhin
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  2. A. V. Zarubin
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Correspondence to V. Yu. Irkhin.

Additional information

Received: 5 January 2004, Published online: 8 June 2004

PACS:

71.10.Fd Lattice fermion models (Hubbard model, etc.) - 71.27. + a Strongly correlated electron systems; heavy fermions - 71.30. + h Metal-insulator transitions and other electronic transitions

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Irkhin, V.Y., Zarubin, A.V. Metal-insulator transition in the Hubbard model: a simple description including the Kondo effect. Eur. Phys. J. B 38, 563–570 (2004). https://doi.org/10.1140/epjb/e2004-00153-6

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  • DOI: https://doi.org/10.1140/epjb/e2004-00153-6

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