TY - JOUR

T1 - Non-linear transport properties of superconducting nanostructures

AU - Martin, A M

AU - Lambert, C J

PY - 1996/12/2

Y1 - 1996/12/2

N2 - 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.

AB - 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.

M3 - Letter

VL - 8

SP - L731-L738

JO - Journal of Physics: Condensed Matter

JF - Journal of Physics: Condensed Matter

SN - 0953-8984

IS - 49

ER -