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 .
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