Self-consistent current-voltage characteristics of superconducting nano-structures

摘要

By solving the Bogoliubov - de Gennes equation self-consistently in thepresence of a non-equilibrium quasi-particle distribution, we compute thecurrent-voltage characteristic of a phase coherent superconducting island witha tunnel barrier at one end. The results show significant structure, arisingfrom the competition between scattering processes at the boundaries of theisland and modification of the order parameter by quasi-particles andsuperflow. This structure is not present in non self-consistent descriptions ofnormal-superconducting nano-structures.