Non-linear conduction in insulating phase of (DMTSA)BF4 under high pressure

Organic conductor (DMTSA)BF 4 is a compound composed of an electron donor DMTSA and a monovalent acceptor BF 4 The conductivity at room temperature is ∼400Ω -1 cm -1 and behaves metallic. At ambient pressure, the gradual metal-insulator transition was observed at ∼200K. We found that the sample shows non-linear conduction in the insulating state under 0.35GPa. We discuss the apparent similarity with the non-linear electric conduction by the density wave sliding.