Local properties in the two-dimensional t-t'-U model

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.

3 pages, 3 figures in one Postscript file, RevTeX, to be published in Physica B

References in corpus (1)

• Influence of next-nearest-neighbor electron hopping on the static and dynamical properties of the 2D Hubbard model

Cited by in corpus (2)

• The Hubbard model within the equations of motion approach
• The Composite Operator Method (COM)