Universal transport in two-dimensional granular superconductors

A. Frydman, O. Naaman, R. C. Dynes

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


The transport properties of quench condensed granular superconductors (Pb, Sn, and Pb-Ag films) are presented and analyzed. These systems exhibit transitions from insulating to superconducting behavior as a function of intergrain spacing. Superconductivity is characterized by broad transitions in which the resistance drops exponentially with reducing temperature. The slope of the log R versus T curves turns out to be universally dependent on the normal state film resistance for all measured granular systems. It does not depend on the material, critical temperature, geometry, or experimental setup. We discuss possible physical scenarios to explain these findings.

Original languageEnglish
Article number052509
Pages (from-to)525091-525094
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number5
StatePublished - 1 Aug 2002


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