journal article·2021-07Open access

Helical-edge transport near ν = 0 of monolayer graphene

Sung Ju Hong, Christopher Belke, Johannes C. Rode, Benedikt Brechtken, Rolf J. Haug

Abstract

The complex nature of filling factor ν = 0 of monolayer graphene is studied in magnetotransport experiments. As a 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 ν = 0. In addition to local transport, nonlocal transport experiments show results being consistent with helical edge transport.
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Research context

OpenAlex topics: Graphene research and applications · Quantum and electron transport phenomena · Topological Materials and Phenomena

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