X-ray evidence for structural changes in the organic conductors, α-(BEDT-TTF)2I3, α-(BEDT-TTF)2IBr2 and ß-(BEDT-TTF)2I3

Yoshio Nogami, S. Kagoshima, T. Sugano, G. Saito

Research output: Contribution to journal › Article

41 Citations (Scopus)

Abstract

Interrelations are investigated between the electrical and structural properties of organic conductors, BEDT-TTF (bis(ethylenedithiolo)tetrathiafulvalene) trihalides. In α-)BEDT-TTF)2I3 evidence is obtained by X-ray diffraction for BEDT-TTF molecular dimerization at the metal-insulator transition temperature of 135 K. Another BEDT-TTF molecular dimerization is found in α-(BEDT-TTF)2IBr2, which has semiconducting properties and an activation energy that increases with decreasing temperature. These dimerizations are considered to be responsible for the changes in the electrical properties. Superconducting ß-(BEDT-TTF)2I3 is found to have a superstructure below 175 K, above which short-range fluctuations are observed up to about 200 K.

Original languageEnglish
Pages (from-to)367-377
Number of pages11
JournalSynthetic Metals
Volume16
Issue number3
DOIs
Publication statusPublished - 1986
Externally publishedYes

Fingerprint

Organic conductors
Dimerization
dimerization
conductors
X rays
Electric properties
electrical properties
Metal insulator transition
x rays
Superconducting transition temperature
Structural properties
Activation energy
transition temperature
insulators
activation energy
X ray diffraction
diffraction
metals
tetrathiafulvalene
Temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

X-ray evidence for structural changes in the organic conductors, α-(BEDT-TTF)2I3, α-(BEDT-TTF)2IBr2 and ß-(BEDT-TTF)2I3. / Nogami, Yoshio; Kagoshima, S.; Sugano, T.; Saito, G.

In: Synthetic Metals, Vol. 16, No. 3, 1986, p. 367-377.

Research output: Contribution to journal › Article

Nogami, Y, Kagoshima, S, Sugano, T & Saito, G 1986, 'X-ray evidence for structural changes in the organic conductors, α-(BEDT-TTF)2I3, α-(BEDT-TTF)2IBr2 and ß-(BEDT-TTF)2I3', Synthetic Metals, vol. 16, no. 3, pp. 367-377. https://doi.org/10.1016/0379-6779(86)90173-6
Nogami Y, Kagoshima S, Sugano T, Saito G. X-ray evidence for structural changes in the organic conductors, α-(BEDT-TTF)2I3, α-(BEDT-TTF)2IBr2 and ß-(BEDT-TTF)2I3. Synthetic Metals. 1986;16(3):367-377. https://doi.org/10.1016/0379-6779(86)90173-6
Nogami, Yoshio ; Kagoshima, S. ; Sugano, T. ; Saito, G. / X-ray evidence for structural changes in the organic conductors, α-(BEDT-TTF)2I3, α-(BEDT-TTF)2IBr2 and ß-(BEDT-TTF)2I3. In: Synthetic Metals. 1986 ; Vol. 16, No. 3. pp. 367-377.
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abstract = "Interrelations are investigated between the electrical and structural properties of organic conductors, BEDT-TTF (bis(ethylenedithiolo)tetrathiafulvalene) trihalides. In α-)BEDT-TTF)2I3 evidence is obtained by X-ray diffraction for BEDT-TTF molecular dimerization at the metal-insulator transition temperature of 135 K. Another BEDT-TTF molecular dimerization is found in α-(BEDT-TTF)2IBr2, which has semiconducting properties and an activation energy that increases with decreasing temperature. These dimerizations are considered to be responsible for the changes in the electrical properties. Superconducting {\ss}-(BEDT-TTF)2I3 is found to have a superstructure below 175 K, above which short-range fluctuations are observed up to about 200 K.",
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T1 - X-ray evidence for structural changes in the organic conductors, α-(BEDT-TTF)2I3, α-(BEDT-TTF)2IBr2 and ß-(BEDT-TTF)2I3

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AU - Kagoshima, S.

AU - Sugano, T.

AU - Saito, G.

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AB - Interrelations are investigated between the electrical and structural properties of organic conductors, BEDT-TTF (bis(ethylenedithiolo)tetrathiafulvalene) trihalides. In α-)BEDT-TTF)2I3 evidence is obtained by X-ray diffraction for BEDT-TTF molecular dimerization at the metal-insulator transition temperature of 135 K. Another BEDT-TTF molecular dimerization is found in α-(BEDT-TTF)2IBr2, which has semiconducting properties and an activation energy that increases with decreasing temperature. These dimerizations are considered to be responsible for the changes in the electrical properties. Superconducting ß-(BEDT-TTF)2I3 is found to have a superstructure below 175 K, above which short-range fluctuations are observed up to about 200 K.

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