Superconducting networks with the proximity effect
Department of Applied Physics, Hokkaido University - Sapporo 060-8628, Japan
2 Center of Education and Research for Topological Science and Technology, Hokkaido University Sapporo 060-8628, Japan
Accepted: 14 April 2011
We report on the first observation of a novel type of superconducting proximity network using a superconductor-normal metal bilayer. Little-Parks oscillation measurements show that the superconducting current flows through a path enclosed by the edge rather than by the center of the Pb/Au wire in the network. Furthermore, several peaks were observed in a power spectrum analysis. We observed that the sequence of these peaks and that of the monolayer network were connected by the power function, which is a factor of the line width, SBn=αn− 2SAn. This suggests that even in a proximity network vortices are arranged in a way identical to a monolayer network.
PACS: 74.45.+c – Proximity effects; Andreev reflection; SN and SNS junctions / 74.78.-w – Superconducting films and low-dimensional structures
© EPLA, 2011