Low-frequency dielectric permittivity of (DI-DCNQI)2Ag in the charge-ordered state

We report the results of measurements of the conductance and the low-frequency dielectric permittivity of the quasi-one-dimensional compound (DI-DCNQI)(2)Ag. We analyse the physical nature of the phase transition occurring in this compound into a charge-ordered state and the formation of the appropriate energy gap. We compare the dielectric properties of (DI-DCNQI)(2)Ag with those resulting from charge-ordered states recently reported in (TMTTF)(2)X salts.