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cond-mat1995★ 53 cited
Anomalous flux quantization in a Hubbard ring with correlated hopping
Liliana Arrachea, A. A. Aligia, E. Gagliano
We solve exactly a generalized Hubbard ring with twisted boundary conditions. The magnitude of the nearest-neighbor hopping depends on the occupations of the sites involved and the…
cond-mat1995★ 3 cited
Charge Transfer Excitons and Possible Exitonic Pairing in the Extended Three Band Hubbard Model
C. Vermeulen, W. Barford, E. R. Gagliano
Exact diagonalisations of the extended Hubbard model are performed. In the insulating regime it is shown that the nearest neighbour copper-oxygen repulsion, , leads to Frenkel e…