FRINGE EFFECT ON CRITICAL-CURRENT OF A GOLD FILM PERCOLATION SYSTEM

In this paper, the fringe effect on critical current has been studied systematically by measuring tie electric transport characteristics of a Au-film system with diffuse fringe structure, It is found experiment ally that, when the fringe effect becomes obvious, the film will exhib it strange I-R characteristics, in which exist a balance current and a critical current. We find that the critical exponents are related to the diffuse fringe structure of the films. The detailed analysis shows that the characteristics result from the thermionic-activating conduc tive effect in the diffuse fringe film system.