Two-band Hamiltonian forplanes
- 1 September 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 42 (7) , 3929-3934
- https://doi.org/10.1103/physrevb.42.3929
Abstract
We show that the three-band Hubbard model of planes, with Cu and bonding O states, can be reduced to a two-band model when the large O-O hopping is taken into account. This leads to an Anderson-lattice-type model with large Coulomb interaction on Cu sites, if the smaller interactions on O sites are neglected. The reduction of the Hilbert space leads to longer-range terms in the two-band Hamiltonian, which we describe by an explicit set of hopping parameters to third neighbor.
Keywords
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