Abstract
The clear enhancements of the superconducting pair-field susceptibilities of the dp+π model at low temperature have been obtained in one and two dimensional lattices. This model includes the second band coming from in-plane oxygen sites which submerges below or cuts the Fermi level in addition to the dp (three band Hubbard) Hamiltonian. There is a pair transfer interaction between the two bands at the oxygen sites. We have presumed that on site Coulomb repulsion at copper site is very large. Here, we will review our results and give some justifications of this model as a model of the high-Tc copper oxides. We will mention about an analogy of the superconducting mechanisms in the copper oxides and the doped C60.
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