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Self-consistent transport properties of superconducting nanostructures

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>1996
<mark>Journal</mark>Czechoslovak Journal of Physics
Issue numbers4
Number of pages2
Pages (from-to)2407-2408
<mark>Original language</mark>English


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.