Dielectric response of the charge-induced correlated state in the quasi-one-dimensional conductor ( TMTTF ) 2 PF 6

Conductivity and permittivity of the quasi-one-dimensionsional organic transfer salt $(\mathrm{TMTTF}{)}_{2}{\mathrm{PF}}_{6}$ have been measured at low frequencies ${(10}^{3}\char21{}{10}^{7}\mathrm{Hz})$ between room temperature down to below the temperature of transition into the spin-Peierls state. We interpret the huge real part of the dielectric permittivity (up to ${10}^{6})$ in the localized state as the realization in this compound of a charge ordered state of Wigner crystal type due to long-range Coulomb interaction.