Bad Superconductors

Dan Shahar
The Weizmann Institute of Science, Israel

In this talk I will describe our studies of highly disordered superconductors. The disorder level in these materials is so high that superconductivity is hardly maintained. Perhaps the most surprising consequence of being on the verge of losing superconductivity, is that the resulting state is a strong insulator, rather than a normal conductor. We will establish the relation between this insulating state and the superconductor, and contemplate its consequences.