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Journal Article

Thermal expansion of the organic conductor β-(BEDT-TTF)2I3

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Schweitzer,  Dieter
Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;

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Keller,  H. J.
Max Planck Institute for Medical Research, Max Planck Society;

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Citation

Hamzic, B., Creuzet, G., Schweitzer, D., & Keller, H. J. (1986). Thermal expansion of the organic conductor β-(BEDT-TTF)2I3. Solid State Communications, 60(9), 763-766. doi:10.1016/0038-1098(86)90438-2.


Cite as: https://hdl.handle.net/21.11116/0000-0006-AC9E-7
Abstract
We report hiogh resolution thermal expansion measurements between 1.2 and 300 K along the c∗-axis in the organic conductor β-(BEDT-TTF)2I3 where the superconducting properties are strongly dependent on the way the system is prepared in the pressure-temperature diagram. We clearly observed a strong anomaly at 172 K related to the structural phase transition and the resistivity anomalies reported by several groups. The temperature analysis in the low temperature regime is coherent with a phonon dominant contribution. Finally, the presence of small hysteresis in a large region around the transitions seem to indicate why both the pressure and the temperature cycling may stabilize small regions of the high-Tc phase of the system, as observed.