Суперпровідність

Yes. Some materials enter a superconducting state below a critical temperature, in which their electrical resistance drops to zero. This is not merely a gradual decrease in resistance during cooling: it is a phase transition, and superconductivity is also characterized by the Meissner effect—the expulsion of magnetic field from the material. The critical temperature, magnetic field, and current depend on the material; exceeding the critical limits destroys the state. “Low temperature” is relative: conventional superconductors require very low temperatures, while so-called high-temperature superconductors operate warmer, but often still cryogenically.