ANOMALOUS NORMAL-STATE PROPERTIES OF HIGH-T-C SUPERCONDUCTORS - INTRINSIC-PROPERTIES OF STRONGLY CORRELATED ELECTRON-SYSTEMS

A systematic study of optical and transport properties of the Hubbard model, based on the Metzner-Vollhardt dynamical mean-field approximati on, is reviewed. This model shows interesting anomalous properties tha t are, in our opinion, ubiquitous to single-band strongly correlated s ystems (for all spatial dimensions greater than one) and also compare qualitatively with many anomalous transport features of the high-T-c c uprates. This anomalous behaviour of the normal-state properties is tr aced to a 'collective single-band Kondo effect', in which a quasiparti cle resonance forms at the Fermi level as the temperature is lowered, ultimately yielding a strongly renormalized Fermi liquid at zero tempe rature.