Question: What makes a superconductor a superconductor?

Keywords:

  1. A superconductor exhibits zero electrical resistance when cooled below a critical temperature (Tc). It also shows something called the Meissner effect – the expulsion of magnetic field lines from the interior of the superconductor as it is cooled to below Tc.

    The superconductor used in lecture 3 was based on the solid-state material YBa2Cu3O7, which was the first compound to have a Tc above 90K.

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