Magnetic field tuning of the S-I transition in thin Al films

Wenhao Wu, Louisiana State University
P. W. Adams, Louisiana State University


We describe superconducting to insulating transitions in ultra-thin granular Al films driven by magnetic fields applied either perpendicular or parallel to the film surface. In a parallel field, we find that at low temperatures increasing field will drive a superconducting film first into a super-resistive phase and then eventually into a more conventional insulating phase. © 1994.