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(Funded by the U.S. Department of Energy and the National Science Foundation)
Place a single sheet of carbon atop another at a slight angle, and remarkable properties emerge, including the resistance-free flow of current known as superconductivity. Now, a team of researchers at Princeton has looked for the origins of this unusual behavior in a material known as magic-angle twisted bilayer graphene and detected signatures of a cascade of energy transitions that could help explain how superconductivity arises in this material.
