ECRYS - 93
J. Phys. IV France 03 (1993) C2-49-C2-52
Metal-to-insulator transition and threshold electric field for SDW depinning in (TMTSF)2X under pressureM. NAGASAWA1, T. SAMBONGI1, K. NOMURA1 and H. ANZAI2
1 Department of Physics, Hokkaido University, Sapporo 060, Japan
2 Department of Materials Sciences, Himeji Institute of Technology, Kanagi, Kamigohri Hyogo 678-12, Japan
Metal-to-insulator transition temperature (TMI) and the activation energy (EA) in the SDW phase of (TMTSF)2AsFe and (TMTSF)2PF6 were determined under pressure. Pressure dependence of 2EA/KBTMI near the critical pressure of the SDW phase, is compared with the mean-field theory by Yamaji. It was found that TMI is not equal to the normal-to-SDW transition temperature but lower than TSDW. Non-linear conduction was observed in a narrow temperature range above TMI.
© EDP Sciences 1993