Specific heat under pressure on selected iron-pnictide superconductors*

The phase diagrams of iron-pnictide superconductors manifest a complex interplay of superconductivity, magnetism and structure which can typically be tuned by external tuning parameters, such as pressure. In this contribution, we report a study of the specific heat under pressure on selected iron-pnictide superconductors, such as FeSe, as well as pure and Co-doped BaFe₂As₂. We will compare pressure-dependent phase diagrams, as well as provide further characterization of the superconducting properties. The latter will, in particular, include a discussion of the evolution of the specific heat jump sizes at the superconducting transition with pressure.