Superconducting networks with the proximity effect

¹ 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

^a TSUCHIYA.Satoshi@nims.go.jp

Received: 30 August 2010
Accepted: 14 April 2011

Abstract

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, S_Bn=α^{n− 2}S_An. This suggests that even in a proximity network vortices are arranged in a way identical to a monolayer network.