Divergence of the relaxation time in the vicinity of the ferroelectric charge-ordered phase transition inF. Nad1, 2, P. Monceau2, L. Kaboub3 and J. M. Fabre3
1 Institute of Radio-Engineering and Electronics, Russian Academy of Sciences Mokhovaya 11, 103907 Moscow, Russia
2 Centre de Recherches sur les Très Basses Températures, CNRS 25 rue des Martyrs, BP 166, 38042 Grenoble cedex 9, France
3 Laboratoire de Chimie Structurale Organique, Université de Montpellier 34095 Montpellier cedex, France
received 16 June 2005; accepted in final form 3 January 2006
published online 13 January 2006
A sharp maximum in the temperature dependence of the relaxation time obtained from low-frequency permittivity measurements is found in the quasi-one-dimensional conductor at a temperature of 101. This maximum is associated with the second-order phase transition into a charge-ordered state of Wigner type. The character of relaxation processes above and below this phase transition is discussed.
71.30.+h - Metal-insulator transitions and other electronic transitions.
71.45.Lr - Charge-density-wave systems.
77.80.Bh - Phase transitions and Curie point.
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