扭曲的二维碳堆叠表现出奇异的超导性

Unconventional superconductors transmit electricity without resistance when cooled, like all superconductors, but require less cooling than most. And there’s no accepted theory that explains how they do it. In conventional superconductors, electrons pair up in a manner that eases their journey through the material. The electron pairs, known as Cooper pairs, also form in unconventional superconductors, but it’s not fully understood what causes the electrons to buddy up in those materials. Scientists study magic-angle graphene because it is simpler and perhaps easier to understand than previously studied unconventional superconductors. Clues could now come from 2-D sheets of carbon called graphene, stacked atop one another and twisted at a certain “magic angle” relative to one another. …