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Pseudogaps in the three-band Hubbard model

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  • Alexei Sherman

    (Institute of Physics, University of Tartu)

Abstract

Using the strong coupling diagram technique, the energy spectrum of the three-band Hubbard model is investigated. In these calculations, the series in powers of the copper-oxygen hybridization for the irreducible part is approximated by two lowest-order terms. For parameters of hole-doped cuprates the calculated energy spectrum consists of lower and upper Hubbard subbands of predominantly copper nature, oxygen bands with some admixture of copper states and the Zhang-Rice states of mixed nature. The spectrum contains two pseudogaps, the lower of which separates the Hubbard subband from Zhang-Rice and oxygen bands. The pseudogaps arise due to multiple reabsorption of carriers in states with double occupancy of sites by holes or electrons.

Suggested Citation

  • Alexei Sherman, 2016. "Pseudogaps in the three-band Hubbard model," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 89(4), pages 1-8, April.
    • Handle: RePEc:spr:eurphb:v:89:y:2016:i:4:d:10.1140_epjb_e2016-60849-4
    DOI: 10.1140/epjb/e2016-60849-4
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    Keywords

    Solid State and Materials;

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