The iron-based superconductor BaFe 2 As 2 suppresses antiferromagnetism by various dopings and pressures and develops superconductivity. We applied pressure to BaFe 2 (As 1- x P x ) 2 with part of As replaced by equivalent P and searched for the essential parameters that govern the superconducting transition temperature by changing two parameters, the P substitution amount and the pressure. As shown in the figure, the superconducting transition temperature at various […]