Condensed Matter Physics Seminar

2 p.m., Thursday, September 20
Room 1201, Physics Building

 Enhanced superconductivity in low Tc and high Tc superconductors near their metal-insulator transitions

M. S. Osofsky

(Naval Research Laboratory, Washington, DC)

Abstract:  It has been known for a long time that  disordered metals and metallic oxides undergo a metal/insulator transition (MIT).  We have found that the superconducting transition temperature Tc is enhanced in the vicinity of the MIT.  We constructed a superconductivity phase diagram (Tc vs s, the conductivity) for each system and found that they are remarkably similar. These results suggest that there is a common mechanism for the enhancement of superconductivity near the MIT. Accordingly, we developed a simple, heuristic model to account for the observed features which is based on scaling theory near the MIT.
Host:  Chris Lobb
Back to Condensed Matter Physics Seminar Home Page