Starting from the Emery model, which is assumed to describe the copper oxygen planes, and including direct oxygen hopping matrix elements, we have been able to derive the effective t-J Hamiltonian for the copper orbitals using the Linked Cluster Expansion Method up to fourth order in the hybridization matrix element.
Journal of Physics Condensed Matter
- Pub Date:
- November 1993
- Condensed Matter
- (ps version of the dvi file, resubmitted because previous uucompressed version was corrupted), 9 pages