Films of rhombohedral graphite as two-dimensional topological semimetals

Sergey Slizovskiy, Edward McCann, Mikito Koshino, Vladimir I. Fal'ko

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Topologically non-trivial states characterized by Berry curvature appear in a number of materials ranging from spin-orbit-coupling driven topological insulators to graphene. In multivalley conductors, such as mono- and bilayer graphene, despite a zero total Chern number for the entire Brillouin zone, Berry curvature with different signs concentrated in different valleys can affect the observable material's transport characteristics. Here we consider thin films of rhombohedral graphite, which appear to retain truly two-dimensional properties up to tens of layers of thickness and host two-dimensional electron states with a large Berry curvature, accompanied by a giant intrinsic magnetic moment carried by electrons. The size of Berry curvature and magnetization in the vicinity of each valley can be controlled by electrostatic gating leading to a tuneable anomalous Hall effect and a peculiar structure of the two-dimensional Landau level spectrum.
Original languageEnglish
JournalCommunications physics
Issue number164
Publication statusPublished - 19 Dec 2019


  • cond-mat.mes-hall

Research Beacons, Institutes and Platforms

  • National Graphene Institute


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