Observation of flat bands in twisted bilayer graphene
- Lisi, Simone
- Lu, Xiaobo
- Benschop, Tjerk
- de Jong, Tobias A.
- Stepanov, Petr
- Duran, Jose R.
- Margot, Florian
- Cucchi, Irène
- Cappelli, Edoardo
- Hunter, Andrew Scott
- Tamai, Anna
- Kandyba, Viktor
- Giampietri, Alessio
- Barinov, Alexei
- Jobst, Johannes
- Stalman, Vincent
- Leeuwenhoek, Maarten
- Watanabe, Kenji
- Taniguchi, Takashi
- Rademaker, Louk
- van der Molen, Sense Jan
- Allan, Milan P.
- Efetov, Dmitri K.
- Baumberger, Felix
Publication date
January 2020
DOI Publisher
Springer Science and Business Media LLCAbstract
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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