Researchers document their discovery of electrons in graphene behaving like a fluid. To make this observation, the team improved methods to create ultra-clean graphene* and developed a new way to measure its thermal conductivity. When the strongly interacting particles in graphene were driven by an electric field, they behaved not like individual particles but like a fluid that could be described by hydrodynamics. “Physics we discovered by studying black holes and string theory, we’re seeing in graphene. This is the first model system of relativistic hydrodynamics in a metal.”

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