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The Theory of Superconductivity
Until 1986 we had this Bardine Cooper Shriffa BCS theory that Nigel's described and one of the predictions that seemed to come out of that theory is that you wouldn't expect to have a superconductor that worked much above 20 degrees above absolute zero. In 1986 two scientists working in an IBM research laboratory just outside Zurich found a new material which superconducted at 30 degrees aboveabsolute zero. Within months that transition temperature there's critical temperature below which you see super conductivity had gone from 30 degrees above absolutezero 40 degrees then it leapt up to about 90 degrees above Absolute Zero. The discovery of huge families of materials that looked like room temperature superconductors was just around the