Explanation
Also called zero resistance effect. A certain materials is a conductor or semiconductor, or even an insulator, at a higher temperature, but when the temperature drops to a certain value Tc, its DC resistance suddenly drops to zero, which is called zero resisitivity effect. materials with zero resistance and Meissner effect at a certain temperature are called superconductors. In 1911, H.K. Onnes, a famous Dutch cryogenic physicist, found that mercury had superconductivity at T=4.1K.
Classification
Special functional materials -> Superconducting materials -> Superconducting parameters