Engineering of the topological magnetic moment of electrons in bilayer graphene using strain and electrical bias

Christian Moulsdale, Angelika Knothe, Vladimir Fal'ko

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Abstract

Topological properties of electronic states in multivalley two-dimensional materials, such as mono and bilayer graphene, or thin films of rhombohedral graphite, give rise to various unusual magneto transport regimes. Here, we investigate the tunability of the topological magnetic moment (related to the Berry curvature) of electronic states in bilayer graphene using strain and vertical bias. We show how one can controllably vary the valley g-factor of the band-edge electrons, g*v, across the range 10 < | g*v| < 200, and we discuss the manifestations of the topological magnetic moment in the anomalous contribution towards the Hall conductivity and in the Landau level spectrum.
Original languageEnglish
JournalPhysical Review B
Early online date12 Feb 2020
DOIs
Publication statusPublished - 15 Feb 2020

Research Beacons, Institutes and Platforms

  • National Graphene Institute

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