Electrical Resistivity of (TMTTF)2PF6 under High Pressure

We investigated the resistivity of quasi 1D organic conductor (TMTTF) 2 PF 6 under high pressure ( P ≦10 GPa) using a cubic anvil pressure system, which can generate a high quality hydrostatic pressure. We observed a superconducting state of (TMTTF) 2 PF 6 under 4 ≦ P ≦5 GPa. Zero resistivity was observed under 4 ≦ P ≦4.5 GPa for the first time. We will discuss the pressure-induced superconductivity with a P – T phase diagram of (TMTTF) 2 PF 6 .