The Meissner influence demonstrated by levitating a magnet over a cuprate superconductor, which happens to be cooled by liquid nitrogen Below some disorders, including particularly low temperatures, some ceramics exhibit high-temperature superconductivity (in superconductivity, "high temperature" suggests higher than 30 K). The explanation for this is simply not recognized, but https://marcorlbpb.blogscribble.com/39434662/nitreto-de-boro-hexagonal-an-overview