Tunneling measurements of fluctuation effects near the superconductor to insulator transition

Shih-ying Hsu, James A. Chervenak, James M. Valles

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We present measurements of the temperature dependence of the tunneling density of states near the Fermi energy, G0(T), and resistive transitions, R(T), of ultrathin PbBi films. Both R(T) and G0(T) broaden substantially near the superconductor to insulator transition (SIT). The broadening in R(T) is not affected by the proximity of a ground plane suggesting that long range Coulomb interactions are not important to the SIT. The results suggest that the transport properties of films near the SIT are influenced by fluctuations in both the phase and the amplitude of the order parameter. We discuss the data in terms of recent theories of the superconducting transition in low superfluid density systems.

Original languageEnglish
Pages (from-to)2065-2067
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Volume59
Issue number10-12
DOIs
StatePublished - 1 Jan 1998

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