Enhanced superconductivity near the metal-insulator transition

Michael S. Osofsky; Robert J. Soulen Jr.; J. H. Claassen; Huengsoo J. Kim; James S. Horwitz

doi:10.1117/12.455491

7 November 2002 Enhanced superconductivity near the metal-insulator transition

Michael S. Osofsky, Robert J. Soulen Jr., J. H. Claassen, Huengsoo J. Kim, James S. Horwitz

Proceedings Volume 4811, Superconducting and Related Oxides: Physics and Nanoengineering V; (2002) https://doi.org/10.1117/12.455491
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

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, T_c, of such materials is enhanced in the vicinity of the MIT. We have constructed superconductivity phase diagrams (T_c 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.

Citation Download Citation

Michael S. Osofsky, Robert J. Soulen Jr., J. H. Claassen, Huengsoo J. Kim, and James S. Horwitz "Enhanced superconductivity near the metal-insulator transition", Proc. SPIE 4811, Superconducting and Related Oxides: Physics and Nanoengineering V, (7 November 2002); https://doi.org/10.1117/12.455491

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