Dynamic susceptibility in two-dimensional Hubbard model

Abstract

The new analytical expression for dynamic spin susceptibility in a two-dimensional Hubbard model has been deduced. The formula can be applied for both cases when carriers are occupied only in lower Hubbard and as in the case when chemical potential is displaced in the upper Hubbard band. It includes as a partial case a few earlier obtained results and allows to calculate the spin dynamic susceptibility for the real hole-doped high-Tc superconductors.