Charge ordering phase transition in the quasi-one-dimensional conductor (TMTTF)₂AsF₆

Abstract

Direct evidence of a new phase transition at TCO = 100.6 K in the organic quasi-one-dimensional (TMTTF)2AsF6 salt has been obtained from conductivity and dielectric permittivity measurements. This phase transition is assigned to a charge-ordered state (4kF charge density wave of Wigner type) due to charge-induced electron-electron interactions.