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Proceedings Paper

Enhanced superconductivity near the metal-insulator transition
Author(s): Michael S. Osofsky; Robert J. Soulen; J. H. Claassen; Huengsoo J. Kim; James S. Horwitz
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Paper Abstract

It has been known for a long time that many systems, including disordered metals and metallic oxides, undergo a metal/insulator transition (MIT). We have found that the superconducting transition temperature, Tc, of such materials is enhanced in the vicinity of the MIT. We have constructed superconductivity phase diagrams (Tc vs σ, the conductivity) for many materials whose only common feature is their proximity to the MIT and found that they are remarkably similar. These results suggest that there is a common mechanism for the enhancement of superconductivity near the MIT. Following this clue, we developed a simple, heuristic model based on scaling theory near the MIT that accounts for the observed features.

Paper Details

Date Published: 7 November 2002
PDF: 10 pages
Proc. SPIE 4811, Superconducting and Related Oxides: Physics and Nanoengineering V, (7 November 2002); doi: 10.1117/12.455491
Show Author Affiliations
Michael S. Osofsky, Naval Research Lab. (United States)
Robert J. Soulen, Naval Research Lab. (United States)
J. H. Claassen, Naval Research Lab. (United States)
Huengsoo J. Kim, SFA, Inc. (United States)
James S. Horwitz, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 4811:
Superconducting and Related Oxides: Physics and Nanoengineering V
Ivan Bozovic; Davor Pavuna, Editor(s)

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