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 language | English |
---|---|
Pages (from-to) | 367-377 |
Number of pages | 11 |
Journal | Synthetic Metals |
Volume | 16 |
Issue number | 3 |
DOIs | |
Publication status | Published - Dec 1986 |
Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry