Abstract
By solving the Bogoliubov-de Gennes equation self-consistently, we compute transport properties of various normal-superconducting mesoscopic structures. Three structures are considered; a single superconducting island, a superconducting island with a delta-function scatterer at one interface and a superconducting island with a delta-function scatterer at the centre of the island. The calculated self-consistent I–V characteristics show significant structure, arising from the competition between scattering processes at the boundaries of the island and modification of the order parameter by quasi-particles and superflow. When the order parameter is significantly modified by the transport current, it is noted that the magnitude of the differential conductance of a single-channel conductor can exceed 2e 2/h.
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G. E. Blonder, M. Tinkham and T. M. Klapwijk, Phys. Rev. B25 4515 (1982).
N. Agrait, J. G. Rodrigo and S. Vieira, Phys. Rev. B46 5814 (1992)
A. Martin and C. J. Lambert, Phys. Rev. B51 17999 (1995)
J. S. Cañazares and F. Sols, J. Phys. Condens. Matter7 L317 (1995).
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This work is supported by the EPSRC, ISI Foundation and the EC HCM program. I would also like to thank F. Sols and J. Sánchez-Cañazares for useful discussions.
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Martin, A.M., Lambert, C.J. Self-consistent transport properties of superconducting nanostructures. Czech J Phys 46 (Suppl 4), 2407–2408 (1996). https://doi.org/10.1007/BF02571195
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DOI: https://doi.org/10.1007/BF02571195