Stacks of graphene, carefully twisted, gain a superpower: They become superconductors. Now scientists have new evidence that this “magic-angle” graphene is a member of a truly strange class of superconductor.
Like all superconductors, the materials, known as unconventional superconductors, transmit electricity without resistance when cooled. But these odd superconductors require less cooling than most. And there’s no accepted theory that explains how they do it.
Clues could now come from 2-D sheets of carbon called graphene, stacked atop one another and twisted just-so. A triple layer of twisted graphene has a key hallmark of many unconventional superconductors, MIT physicist Pablo Jarillo-Herrero and colleagues report November 6 in Science.
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