Next Article in Journal / Special Issue
Thermodynamic Properties of κ-(BEDT-TTF)2X Salts: Electron Correlations and Superconductivity
Previous Article in Journal
Thermodynamic Properties, Hysteresis Behavior and Stress-Strain Analysis of MgH2 Thin Films, Studied over a Wide Temperature Range
Previous Article in Special Issue
Single-Component Charge-Transfer Crystals Based on Spin-Carrying TCNQ (7,7,8,8-Tetracyanoquinodimethane) Derivatives
Crystals 2012, 2(3), 730-740; doi:10.3390/cryst2030730
Article

Gate-Induced Thermally Stimulated Current on the Ferroelectric-like Dielectric Properties of (BEDT-TTF)(TCNQ) Crystalline Field Effect Transistor

1,* , 1
, 1
, 1
, 2
 and 1
1 Department of Electrical and Electronic Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan 2 Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
* Author to whom correspondence should be addressed.
Received: 20 March 2012 / Revised: 15 June 2012 / Accepted: 18 June 2012 / Published: 29 June 2012
(This article belongs to the Special Issue Molecular Conductors)
View Full-Text   |   Download PDF [332 KB, uploaded 29 June 2012]   |   Browse Figures

Abstract

A gate-induced thermally stimulated current (TSC) on β′-(BEDT-TTF)(TCNQ) crystalline FET were conducted to elucidate the previously observed ferroelectric-like behaviors. TSC which is symmetric for the polarization of an applied VPG and has a peak at around 285 K was assigned as a pyroelectric current. By integrating the pyroelectric current, temperature dependence of the remnant polarization charge was obtained and the existence of the ferroelectric phase transition at 285 K was clearly demonstrated. We have tentatively concluded that the phase transition between dimer Mott insulator and charge ordered phase occurred at around the interface of organic crystal and substrate.
Keywords: ferroelectricity; pyroelectric current; field effect transistor; Mott insulator; charge order ferroelectricity; pyroelectric current; field effect transistor; Mott insulator; charge order
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Export to BibTeX |
EndNote


MDPI and ACS Style

Sakai, M.; Hanada, M.; Kuniyoshi, S.; Yamauchi, H.; Nakamura, M.; Kudo, K. Gate-Induced Thermally Stimulated Current on the Ferroelectric-like Dielectric Properties of (BEDT-TTF)(TCNQ) Crystalline Field Effect Transistor. Crystals 2012, 2, 730-740.

View more citation formats

Article Metrics

Comments

Citing Articles

[Return to top]
Crystals EISSN 2073-4352 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert