Ferroelectric Mott-Hubbard phase of organic (TMTTF)2X conductors.
We present experimental evidence and a corresponding theory for the ferroelectric 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.
Monceau
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Centre de Recherches sur les Très Basses Températures, laboratoire associé à l'Université Joseph Fourier, CNRS, BP 166, 38042 Grenoble cedex 9, France.
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Brazovskii
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