Graphene Superconductors May Be Less Exotic Than Physicists Hoped

Three years ago, physicists discovered that two stacked sheets of carbon with a tiny, 1.1-degree twist between them could exhibit a dazzling array of behaviors. Most famously, when cooled to low temperatures, the material conducts electricity with zero resistance. Researchers raced to figure out why twisted bilayer graphene (as it’s called) becomes a superconductor, with a form of…

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