Static and dynamic properties of the SDW in (TMTSF)2X

The static and dynamic properties of incommensurate SDW phase in (TMTSF) 2 PF 6 were investigated by the NMR and non-linear conductivity measurements. The temperature dependence of T 1 -1 indicates the sub-phase transition in the SDW phase In the low temperature SDW sub-phase, the non-linear conductivity, associated with the sliding motion of the SDW, is observed with a clear threshold field In addition, the temperature independent non-linear conductivity appears for a higher electric field and its field dependence suggests the quantum origin. These behaviours are discussed in the viewpoint of the SDW with the discommensuration.