Pressure dependence of superconductivity in an organic superconductor bis-tetramethyltetraselenafulvalene hexafluorophosphate

The transition temperature of bis-tetramethyltetraselenafulvalene hexafluorophosphate (TMTSF)2PF6 is found to decrease for pressures up to 12 kbar at a rate dTcdP=(-81)×10-5 K/bar. At 6.5 kbar, a coexistence of superconductivity (Tc1.1 K) and a metal-insulator transition (TMI6 K) is found. © 1980 The American Physical Society.