Ever since graphene's discovery in 2004, scientists have looked for ways to put this 2D material to work. Last year, scientists at Lawrence Berkeley National Laboratory developed a multitasking graphene device that switches from a superconductor, which efficiently conducts electricity, to an insulator, which resists the flow of electric current, and back again to a superconductor. Now, the scientists have tapped into the graphene system's talent for juggling not just two properties, but three: superconducting, insulating, and a type of magnetism called ferromagnetism.
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