12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Non-linear transport properties of superconduct...
View graph of relations

« Back

Non-linear transport properties of superconducting nanostructures

Research output: Contribution to journalLetter

Published

Journal publication date2/12/1996
JournalJournal of Physics: Condensed Matter
Journal number49
Volume8
Number of pages8
PagesL731-L738
Original languageEnglish

Abstract

By solving the Bogoliubov-de Gennes equation seIf-consistently, we compute transport properties of a one dimensional superconducting island with a delta-function normal scatterer at the centre. The calculated 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. At a certain critical current, the order parameter exhibits a quasi-first-order transition to the normal state, smeared by the finite system size. At this point, the differential conductance is negative and can have a magnitude greater than 2e(2)/h, despite the fact that there is only a single scattering channel.