Abstract
We present the results of an infinite order unitary transformation applied to a multiband Hubbard Hamiltonian by which it can be shown rigorously that an attractive interaction term appears at the oxygen ion sites as a result of oxygen-copper virtual charge excitations. This exact result yields convincing evidence that the pairing mechanism in two and/or three band Hubbard models results precisely from this attraction.
Original language | English |
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Pages (from-to) | 651-658 |
Number of pages | 8 |
Journal | Journal of Superconductivity and Novel Magnetism |
Volume | 14 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2001 |