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