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Disorder induced helical-edge transport near $ν$=0 of monolayer graphene (1908.02420v1)

Published 7 Aug 2019 in cond-mat.mes-hall

Abstract: The complex nature of filling factor $\nu$=0 of monolayer graphene is studied in magnetotransport experiments. As function of perpendicular magnetic field a metal-insulator transition is observed, which is attributed to disorder-induced Landau level broadening in the canted antiferromagnetic phase. In the metallic regime a separation of the zeroth Landau level appears and signs of the quantum spin Hall effect are seen near $\nu$=0. In addition to local transport, nonlocal transport experiments show results being consistent with helical edge transport.

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