Fractional order Shapiro steps in superconducting nanowires

R. C. Dinsmore, Myung Ho Bae, A. Bezryadin

Research output: Contribution to journalArticlepeer-review


We expose superconducting nanowires to microwave radiation in order to study phase lock-in effects in quasi-one-dimensional superconductors. For sufficiently high microwave powers a resistive branch with Shapiro steps appears in the voltage-current characteristics. At frequencies in the range of 0.9-4 GHz these steps are of integer order only. At higher frequencies steps of 1/2, 1/3, 1/4, and even 1/6 order appear. We numerically model this behavior using a multivalued current-phase relationship for nanowires.

Original languageEnglish (US)
Article number192505
JournalApplied Physics Letters
Issue number19
StatePublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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