We present experimental evidence for the occurrence of energy-gap structure and microwave-assisted tunneling in the IV curves for superconducting thin-film weak links. From measurements of the power and the temperature dependence of the Josephson steps we argue that also the Riedel peak is observable in weak links.
Bibliographical noteCopyright (1973) by the American Physical Society.
Kofoed, B., & Særmark, K. (1973). Energy Gap, Microwave-Assisted Tunneling, and Josephson Steps in Thin-Film Weak Links at 63 and 302 GHz. Physical Review Letters, 31(18), 1124-1126. https://doi.org/10.1103/PhysRevLett.31.1124