Strong coupling diagram technique for the three-band Hubbard model
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Publication:2814463
DOI10.1142/S0217979216420042zbMATH Open1338.82033arXiv1510.03624MaRDI QIDQ2814463
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Publication date: 22 June 2016
Published in: International Journal of Modern Physics B (Search for Journal in Brave)
Abstract: Using the strong coupling diagram technique equations are derived for hole Green's functions of the three-band Hubbard model, which describes Cu-O planes of high- cuprates. The equations are self-consistently solved in the approximation, in which the series for the irreducible part in powers of the oxygen-copper hopping constant is truncated to two lowest-order terms. For parameters used for hole-doped cuprates the calculated energy spectrum consists of lower and upper Hubbard subbands of predominantly copper nature, oxygen bands with a small admixture of copper states and the Zhang-Rice states of mixed nature, which are located between the lower Hubbard subband and oxygen bands. The spectrum contains also pseudogaps near transition frequencies of Hubbard atoms on copper sites.
Full work available at URL: https://arxiv.org/abs/1510.03624
Interacting particle systems in time-dependent statistical mechanics (82C22) Statistical mechanics of superconductors (82D55) Quantum dynamics and nonequilibrium statistical mechanics (general) (82C10)
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