The ferroelectric Mott-Hubbard phase of organic (TMTTF)2X conductors

Pierre Monceau (1) , F. Ya Nad (1, 2) , Serguei Brazovskii (3, 4)

1 CRTBT - Centre de Recherches sur les Très Basses Températures
2 Institute of Radio-Engineering and Electronics
3 LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
4 L.D. Landau Institute for Theoretical Physics of RAS

We present experimental evidences for a ferro-electric transition in the family of quasi one- dimensional conductors (TMTTF)2X. We interpret this new transition in the frame of the combined Mott-Hubbard state taking into account the double action of the spontaneous charge disproportionation on the TMTTF molecular stacks and of the X anionic potentials.

Mots clés: Strongly Correlated Electrons

Domaines: Matière Condensée [cond-mat]

Pierre Monceau, F. Ya Nad, Serguei Brazovskii. The ferroelectric Mott-Hubbard phase of organic (TMTTF)2X conductors. Physical Review Letters, 2001, 86, pp.4080-4083. ⟨hal-00002421⟩