The electrical conductivity of TTF-TCNQ under pressureReport as inadecuate

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Abstract : We report b-axis electrical conductivity data for TTF-TCNQ single crystals from 20-300 K under hydrostatic pressures of up to 6 kbar. There are two anomalies in the conductivity. Under pressure, the temperature of the well-known metal-insulator transition at 54 K increases slightly in agreement with the earlier work of Chu et al

We find that the temperature of the lower anomaly at 38 K decreases slowly with pressure. Since there is evidence that the conduction electron bandwidths increase substantially in the above pressure range it is not easy to interpret these results in terms of current theories of the Peierls transition.

Keywords : electrical conductivity of solid semiconductors and insulators metal insulator transition organic compounds Peierls instability electrical conductivity TTF TCNQ hydrostatic pressures 6 kbar conduction electron bandwidths Pierls transition 20 to 300K

Author: J.R. Cooper D. Jérome M. Weger S. Etemad



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