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Graphene bilayers with a twist

Nature Materials volume 19, pages 1265–1275 (2020)Cite this article

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An Author Correction to this article was published on 05 January 2021

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Abstract

Near a magic twist angle, bilayer graphene transforms from a weakly correlated Fermi liquid to a strongly correlated two-dimensional electron system with properties that are extraordinarily sensitive to carrier density and to controllable environmental factors such as the proximity of nearby gates and twist-angle variation. Among other phenomena, magic-angle twisted bilayer graphene hosts superconductivity, interaction-induced insulating states, magnetism, electronic nematicity, linear-in-temperature low-temperature resistivity and quantized anomalous Hall states. We highlight some key research results in this field, point to important questions that remain open and comment on the place of magic-angle twisted bilayer graphene in the strongly correlated quantum matter world.

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Fig. 1: Structure of monolayer graphene and TBG.
Fig. 2: Electronic properties of TBG.
Fig. 3: Comparison of MATBG and high-temperature superconductors.
Fig. 4: Flat-band MATBG observed with local probes.
Fig. 5: Nematicity and multiple superconducting domes in MATBG.
Fig. 6: Moiré bands and Fermi surface.
Fig. 7: Beyond MATBG.

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Change history

  • 05 January 2021

    A Correction to this paper has been published: https://doi.org/10.1038/s41563-020-00917-w.

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Acknowledgements

E.Y.A. acknowledges support from DOE (DOE-FG02-99ER45742) and the Gordon and Betty Moore Foundation (GBMF9453). A.H.M. acknowledges support from DOE BES grant DE- FG02-02ER45958 and from Welch Foundation grant TBF1473.

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  1. Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA

    Eva Y. Andrei

  2. Department of Physics, The University of Texas at Austin, Austin, TX, USA

    Allan H. MacDonald

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Correspondence to Eva Y. Andrei.

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Andrei, E.Y., MacDonald, A.H. Graphene bilayers with a twist. Nat. Mater. 19, 1265–1275 (2020). https://doi.org/10.1038/s41563-020-00840-0

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