AC Josephson properties of phase slip lines in wide tin films

TL;DR

This paper demonstrates Josephson-like behavior in phase slip lines within wide tin superconducting films, showing their current-voltage characteristics under microwave irradiation resemble those of Josephson junctions.

Contribution

It provides experimental evidence that phase slip lines in wide superconducting films exhibit Josephson properties, highlighting similarities with narrow channels and Josephson junctions.

Findings

Current steps depend on microwave power similarly to Josephson junctions.

Phase slip lines show Josephson-like current-voltage behavior.

Supports the analogy between phase slips in wide and narrow films.

Abstract

Current steps in the current-voltage characteristics of wide superconducting Sn films exposed to a microwave irradiation were observed in the resistive state with phase slip lines. The behaviour of the magnitude of the steps on the applied irradiation power was found to be similar to that for the current steps in narrow superconducting channels with phase slip centers and, to some extent, for the Shapiro steps in Josephson junctions. This provides evidence for the Josephson properties of the phase slip lines in wide superconducting films and supports the assumption about similarity between the processes of phase slip in wide and narrow films.