Figure 1
From: Suppression of superconductivity and structural phase transitions under pressure in tetragonal FeS

(a,b) Temperature dependence of resistance for tetragonal FeS at various pressures, demonstrating a metal-insulator transition at 6.0 GPa. (c) Pressure dependence of the superconducting transition temperature Tc. (d) Selected pressure dependence of resistance at various temperatures, showing a phase transition at around 6.0 GPa.