Title: Quasiparticle entropy in superconductor/normal metal/superconductor proximity junctions in the diffusive limit,
Abstract: We discuss the quasiparticle entropy and heat capacity of a dirty
superconductor-normal metal-superconductor junction. In the case of short
junctions, the inverse proximity effect extending in the superconducting banks
plays a crucial role in determining the thermodynamic quantities. In this case,
commonly used approximations can violate thermodynamic relations between
supercurrent and quasiparticle entropy. We provide analytical and numerical
results as a function of different geometrical parameters. Quantitative
estimates for the heat capacity can be relevant for the design of caloritronic
devices or radiation sensor applications.