New Phenomena in Grain Boundary Josephson Junction Networks of BaPb0.7Bi0.3O3 Films

Publisher Website
Google Scholar
Abstract
The grain boundaries of superconducting BaPb0.7Bi0.3O3 (BPB) sputtered thin films work as Josephson junctions and also form two-dimensional junction arrays. Each film was shaped into a cross-pattern, with a gate and control lines, crossing each other perpendicularly. When the control current exceeds a certain critical value, the I–V curve of the gate behaves in two different ways: (1) With W g<W c (gate and control line widths), Josephson current for the gate line shifts by 2n Δ/e (n: integer); (2) With W g>W c, curves in voltage state are elongated through the V-axis into the opposite quadrant.

This publication has 6 references indexed in Scilit: