Collective modes in organic conductors and superconductors
Résumé
The recent discovery of non-linear conductivity in the Peierls state of TTF-TCNQ is attributed to a collective motion of the CDW condensate. High-pressure studies support this point of view. NMR relaxation rates, far infrared conductivity and microwave conductivity in (TMTSF)2X conductors are consistent with the development of a 1-D collective mode (conducting and magnetic) below 30 K.