EFFECT OF THE NESTING ON THE FERMI-SURFACE ON NORMAL-STATE PROPERTIESOF QUASI-2-DIMENSIONAL SUPERCONDUCTORS

We discuss a model of quasi-two-dimensional superconductors, in which the Fermi surface exhibit an imperfect nesting property. Nesting prope rties lead to important effect of antiferromagnetic fluctuations on th e normal state properties, such as the resistivity, the knight shift a nd NMR relaxation rate, the magnetic susceptibility. These fluctuation s play an important role for temperatures of the same order as the ene rgy departure from perfect nesting((1)). We discuss the relevance of t his model to interpret recent experimental data in high T-c cuprate ox yde superconductors as well as organic superconductors. It seems that many properties of these various compounds might be interpreted in thi s way.