LOGARITHMIC CORRECTION TERMS OF THE MAGNETIC-SUSCEPTIBILITY IN HIGHLY CORRELATED ELECTRON-SYSTEMS

The logarithmic correction terms in the repulsive Hubbard chain is investigated by using the Bethe Ansatz. The magnetic susceptibility chi of this model has a field dependent logarithmic correction term in small magnetic field at zero-temperature. This term causes partial derivative chi/partial derivative h\(h=0)=infinity. In arbitrary n and U the existence of the logarithmic correction term is shown for the susceptibility. We consider how this term depends on n and U. We also discuss the logarithmic correction term of the super-symmetric t-J model.