The role of density of states fluctuations in the normal state anomalies of high T-c superconductors

The role of the DOS fluctuations in the normal properties anomalies of HTS is analyzed. It is shown how, taking into account this effect, many puzzling and long debated properties of HTS materials (e.g. the steep increase of the electrical resistivity along the c axis just above T-c, the anomalous magnetoresistance, the effects of the magnetic field on the resistive transition along the c-axis, the c-axis far infrared absorption spectrum, NMR spectra around the critical temperature etc.) can be understood, leading to a simple consistent description in terms of fluctuation theory.