NON-FERMI LIQUID FEATURES IN Q1D ORGANIC CONDUCTORS DUE TO THEIR PROXIMITY TO SDW STATE

We discuss applicability of the Fermi liquid approach to low-temperatu re properties of the Bechgaard salts, (TMTSF)(2)X. Numerous phenomena in these materials are well described in terms of a model of two warpe d open Fermi surfaces with nesting properties. Although intrinsic one- dimensional interactions and three-dimensional effects renormalize par ameters of the electron spectrum, at low temperature the system behave s as a weakly interacting Fermi gas. The fact that an SDW/CDW phase tr ansition may take place in these compounds finds its reflection in pro perties of the metallic state, which arises if the transition is suppr essed by applying pressure. We consider a few manifestations of these effects, including implications to the far-infrared conductivity. Some other phenomena are also discussed in the context of importance of el ectron correlations for these materials.