The expulsion of a magnetic field from the interior of these materials is called the Meissner effect.
These materials can be classified into two categories based on the ratio of their penetration depth to coherence length, which is called the Ginzburg-Landau parameter. Ceramic materials such as LBCO and yttrium barium copper oxide are examples of their high-temperature variety. Electrons in these materials exist as Cooper pairs according to BCS theory. The expulsion of a magnetic field from the interior of these materials is called the Meissner effect. For 10 points, name these materials that conduct an electric current with zero electrical resistance.
These materials can be classified into two categories based on the ratio of their penetration depth to coherence length, which is called the Ginzburg-Landau parameter.
superconductors 