Local properties in the two-dimensional t-t'-U model
Adolfo Avella, Ferdinando Mancini, Dario Villani, Hideki Matsumoto
Abstract
We have studied the t-t'-U model by means of the composite operator method. The effect of the bare diagonal hopping term t' that appears to be material dependent for high-Tc cuprate superconductors is analyzed in detail. In particular, some local quantities are computed and a comprehensive comparison with the data by numerical simulations on finite size lattices is presented. The result show a good agreement with those obtained by Monte Carlo methods.
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