Universal transport in two-dimensional granular superconductors

A. Frydman, O. Naaman, and R. C. Dynes
Phys. Rev. B 66, 052509 – Published 13 August 2002; Erratum Phys. Rev. B 75, 219905 (2007)
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Abstract

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.

  • Received 16 April 2002

DOI:https://doi.org/10.1103/PhysRevB.66.052509

©2002 American Physical Society

Erratum

Authors & Affiliations

A. Frydman1, O. Naaman2, and R. C. Dynes2

  • 1Department of Physics, Bar Ilan University, Ramat Gan, 52900, Israel
  • 2The Department of Physics, University of California, San Diego, La Jolla, California 92093

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Vol. 66, Iss. 5 — 1 August 2002

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