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    Observation of Van Hove singularities in twisted graphene layers

    When a Van Hove singularity exists near the Fermi energy of a solid’s density of states, it can cause a variety of exotic phenomena to emerge. Scanning tunnelling microscope measurements indicate that when gra...

    Guohong Li, A. Luican, J. M. B. Lopes dos Santos, A. H. Castro Neto in Nature Physics (2010)