The above-gap structure in normal-metal-superconductor junctions

A. Vaknin*, Z. Ovadyahu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We report on the observation of zero-bias anomalies and above-the-gap structure in the current-voltage characteristics of Au-InOx-Pb tunnel junctions. The above-gap modulations appear at energies that scale with the superconductor gap. Following thermal anneals these energies shift randomly in the range 4-20 mV. The conductance changes associated with these anomalies also vary in a non-systematic way and are typically of the order of 10-100 e2/h.

Original languageAmerican English
Pages (from-to)L303-L306
JournalJournal of Physics Condensed Matter
Issue number19
StatePublished - 12 May 1997


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