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Consistent low-energy reduction of the three-band model for copper oxides with O-O hopping to the effective t-J model | V.I. Belinicher
; A.L. Chernyshev
; | Date: |
1 Sep 1993 | Journal: | Phys. Rev. B 49, 9746 (1994) | Subject: | cond-mat | Abstract: | A full three-band model for the CuO$_{2}$ plane with inclusion of all essential interactions - Cu-O and O-O hopping, repulsion at the copper and oxygen and between them - is considered. A general procedure of the low-energy reduction of the primary Hamiltonian to the Hamiltonian of the generalized $t$-$t’$-$J$ model is developed. An important role of the direct O-O hopping is discussed. Parameters of the effective low-energy model (the hopping integral, the band position and the superexchange constant $J$ are calculated. An analysis of the obtained data shows that the experimental value of $J$ fixes the charge transfer energy $Delta =(epsilon_{p}-epsilon_{d})$ in a narrow region of energies. | Source: | arXiv, cond-mat/9309002 | Services: | Forum | Review | PDF | Favorites |
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