Critical dynamics and domain motion from permittivity of the electronic ferroelectric (TMTTF)2AsF6 - Archive ouverte HAL Access content directly
Journal Articles Physica B: Condensed Matter Year : 2015

Critical dynamics and domain motion from permittivity of the electronic ferroelectric (TMTTF)2AsF6

Abstract

The quasi one-dimensional organic conductor (TMTTF)2AsF6 shows the charge ordering transition at Tc101K to a state of the ferroelectric Mott insulator which is still well conducting. We present and interpret the experimental data on the gigantic dielectric response in the vicinity of TCO, concentrating on the frequency dependence of the inverse $1/\epsilon$ of the complex permittivity $\epsilon=\epsilon^\prime+i\epsilon^{\prime\prime}$. Surprisingly for a ferroelectric, we could closely approach the 2nd order phase transition and to deeply reach the critical dynamics of the polarization. We could analyse the critical slowing-down when approaching Tc from both sides and to extract the anomalous power law for the frequency dependence of the order parameter viscosity. Moreover, below Tc we could extract a sharp absorption feature coming from a motion of domain walls which shows up at a frequency well below the relaxation rate.
Fichier principal
Vignette du fichier
1501.06847.pdf (234.33 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-01135388 , version 1 (11-05-2022)

Identifiers

Cite

S. Brazovskii, Pierre Monceau, F. Ya. Nad. Critical dynamics and domain motion from permittivity of the electronic ferroelectric (TMTTF)2AsF6. Physica B: Condensed Matter, 2015, Special Issue on Electronic Crystals (ECRYS-2014), 460, pp.79-82. ⟨10.1016/j.physb.2014.11.044⟩. ⟨hal-01135388⟩
46 View
20 Download

Altmetric

Share

Gmail Facebook X LinkedIn More