Detection of vortex motion in a type‐II superconductor by tunneling

Publisher Website
Google Scholar
Abstract
A tunnel junction with adjustable barrier width was made using superconductingelectrodes, one of which was a niobium tip and the other a niobium sheet. Quasiparticletunneling characteristics with normal‐state resistances of the order of 102 to 105 Ω could be obtained. When operating in the constant current mode a clearly visible modulation of the gap voltage was observed associated with the passing of vortices across the junction. While these observations indicate the possibility of scanning tunneling microscopy of vortices at rest, we report here on local investigations of vortex motion using constant tip position. The gap modulation signal was analyzed using its autocorrelation function.

This publication has 0 references indexed in Scilit: