Onset of superconductivity in the two-dimensional limit

D. B. Haviland, Y. Liu, and A. M. Goldman
Phys. Rev. Lett. 62, 2180 – Published 1 May 1989
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Abstract

The onset of superconductivity in homogeneous ultrathin films is found to occur when their normal-state sheet resistance falls below a value close to h/4e2, the quantum resistance for pairs. The data further suggest that in the T→0 limit such films are either superconducting or insulating. The existence of a threshold in systems which are not granular implies that its explanation involves more general arguments than those which follow from the modeling of films by Josephson-coupled arrays.

  • Received 2 February 1989

DOI:https://doi.org/10.1103/PhysRevLett.62.2180

©1989 American Physical Society

Authors & Affiliations

D. B. Haviland, Y. Liu, and A. M. Goldman

  • School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455

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Issue

Vol. 62, Iss. 18 — 1 May 1989

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