TRANSVERSE TRANSPORT IN (TM)(2)X ORGANIC CONDUCTORS - POSSIBLE EVIDENCE FOR A LUTTINGER LIQUID

We present c-axis resistivity measurements performed on the organic co nductors (TMTSF)(2)PF6 and (TMTTF)(2)PF6 under pressure. The aim is to probe the density of states of quasi-one dimensional compounds the hi gh temperature properties of which are those of a Luttinger liquid. It is found that the 1-D Luttinger description breaks down below a speci fic pressure-dependent temperature, giving rise to a transient regime. The Fermi liquid behaviour is however restored at low temperature i.e . around 10 K, as evidenced by NMR measurements. Accordingly, two diff erent energy scales 100 K and 10 E; are required to get a fair underst anding of all observed physical phenomena. Our interpretation supports the picture of a power law exponent K-rho for the correlation functio ns of the order of 0.25-0.30.