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      Measuring Hall viscosity of graphene’s electron fluid

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          Abstract

          An electrical conductor subjected to a magnetic field exhibits the Hall effect in the presence of current flow. Here we report a qualitative deviation from the standard behavior in electron systems with high viscosity. We find that the viscous electron fluid in graphene responds to non-quantizing magnetic fields by producing an electric field opposite to that generated by the ordinary Hall effect. The viscous contribution is substantial and identified by studying local voltages that arise in the vicinity of current-injecting contacts. We analyze the anomaly over a wide range of temperatures and carrier densities and extract the Hall viscosity, a dissipationless transport coefficient that was long identified theoretically but remained elusive in experiments.

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          Most cited references31

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          Electronic Properties of Graphene Encapsulated with Different Two-Dimensional Atomic Crystals

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            Viscosity of Quantum Hall Fluids

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              Hydrodynamics of electrons in graphene

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                Author and article information

                Journal
                Science
                Science
                American Association for the Advancement of Science (AAAS)
                0036-8075
                1095-9203
                February 28 2019
                : eaau0685
                Article
                10.1126/science.aau0685
                30819929
                45b3b01c-7754-4897-81e1-0fcb1e903f66
                © 2019
                History

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