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

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

Physical Review Letters 86 (2001) 4080-4083

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.

  • 1. Centre de Recherches sur les Très Basses Températures (CRTBT),
    CNRS : UPR5001 – Université Joseph Fourier - Grenoble I – Institut National Polytechnique de Grenoble (INPG)
  • 2. Institute of Radio-Engineering and Electronics,
    Institute of Radio-Engineering and Electronics
  • 3. Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS),
    CNRS : UMR8626 – Université Paris XI - Paris Sud
  • 4. L.D. Landau Institute for Theoretical Physics,
    Landau Institute for Theoretical Physics