Quasiparticle entropy in superconductor/normal metal/superconductor proximity junctions in the diffusive limit
P. Virtanen, F. Vischi, E. Strambini, M. Carrega, F. Giazotto
DOI 10.1103/PhysRevB.96.245311 · Physical Review B
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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.
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