Disappearing Superconductivity Is 2d

摘要

Scientists studying a material that appeared to lose its superconductivity say new measurements reveal that the material is indeed a superconductor - but only in two dimensions. This 2D superconductivity emerges at a higher temperature than ordinary 3-D superconductivity. The research was conducted in part by physicist John Tranquada at the DOE's Brookhaven National Laboratory. The basic idea behind superconductivity is that electrons, which ordinarily repel one another, pair up to carry electrical current with no resistance. Conventional metallic superconductors do this at near 0 K, requiring costly cooling systems. Recently, materials have been discovered that transition to superconductivity at higher temperatures.