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,* email, 1email, 1email, 1email, 2email and 1email
Received: 20 March 2012; in revised form: 15 June 2012 / Accepted: 18 June 2012 / Published: 29 June 2012
(This article belongs to the Special Issue Molecular Conductors)
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.
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
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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.

AMA 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(3):730-740.

Chicago/Turabian Style

Sakai, Masatoshi; Hanada, Mitsutoshi; Kuniyoshi, Shigekazu; Yamauchi, Hiroshi; Nakamura, Masakazu; Kudo, Kazuhiro. 2012. "Gate-Induced Thermally Stimulated Current on the Ferroelectric-like Dielectric Properties of (BEDT-TTF)(TCNQ) Crystalline Field Effect Transistor." Crystals 2, no. 3: 730-740.

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