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Scientific article
Letter
English

Observation of flat bands in twisted bilayer graphene

Published inNature physics, vol. 17, no. 2, p. 189-193
Publication date2020-09-28
Abstract

We combine different imaging techniques and angle-resolved photoemission with simultaneous real- and momentum-space resolution (nano-ARPES) to directly map the band dispersion in twisted bilayer graphene devices near charge neutrality. Our experiments reveal large areas with a homogeneous twist angle that support a flat band with a spectral weight that is highly localized in momentum space. The flat band is separated from the dispersive Dirac bands, which show multiple moiré hybridization gaps. These data establish the salient features of the twisted bilayer graphene band structure.

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Citation (ISO format)
LISI, Simone et al. Observation of flat bands in twisted bilayer graphene. In: Nature physics, 2020, vol. 17, n° 2, p. 189–193. doi: 10.1038/s41567-020-01041-x
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ISSN of the journal1745-2473
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