Josephson effects in ultrashort mean-free-path superconductors

Abstract
We show that it is possible to observe Josephson effects at temperatures up to 17 K in a superconductor with intrinsic mean free path 3Sn microbridges near Tc is consistent with predictions of the one‐dimensional Ginzburg‐Landau (ODGL) theory, while microwave‐induced steps in the current‐voltage characteristics are in excellent agreement with the resistively shunted junction (RSJ) model.