ANOMALOUS CURRENT PEAKS IN THE 1-V CHARACTERISTIC FOR TUNNELING BETWEEN TWO SUPERCONDUCTORS,
ILLINOIS UNIV URBANA COORDINATED SCIENCE LAB
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A study was made of the two-superconductor tunneling characteristics of sandwiches of Nb-Nb Oxide-In. Observation was of not only the dc Josephson effect a zerovoltage tunneling supercurrent, but also, at finite voltages, dc current peaks of comparable magnitude. A similar effect has been seen in junctions exhibiting dc zerovoltage currents apparently due to low critical current superconducting shorts.