Scaling of the insulator-to-superconductor transition in ultrathin amorphous Bi films

Y. Liu, K. A. McGreer, B. Nease, D. B. Haviland, G. Martinez, J. W. Halley, A. M. Goldman

Research output: Contribution to journalArticlepeer-review

119 Scopus citations

Abstract

Study of the electrical conductances of a series of ultrathin Bi films as a function of increasing thickness has revealed behavior which can be correlated with the onset of superconductivity, even in the insulating state. The conductances of these films scale empirically with a single parameter which falls to zero when the films become superconductive. These observations suggest a direct transition between insulating and superconducting behavior. This transition occurs at a normal-state sheet resistance close to the quantum resistance for pairs, Rq=h/4e2.

Original languageEnglish (US)
Pages (from-to)2068-2071
Number of pages4
JournalPhysical review letters
Volume67
Issue number15
DOIs
StatePublished - 1991

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