Nano-ARPES observation of a flat band at the \bar{M} point in 2.4° twisted bilayer graphene

@misc{feraco2026nanoarpes,
  title = {{Nano-ARPES observation of a flat band at the \barM point in 2.4° twisted bilayer graphene}},
  author = {Giovanna Feraco and Przemysław Przybysz and Oreste De Luca and Ying Wang and Pavel Dudin and José Avila and Jianting Ye and Paweł Dąbrowski and Paweł J. Kowalczyk and Jagoda Sławińska and Petra Rudolf and Antonija Grubišić-Čabo},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.32714},
  eprint = {2610.32714},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.32714},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Nano-ARPES observation of a flat band at the \bar{M} point in 2.4° twisted bilayer graphene
AU  - Giovanna Feraco
AU  - Przemysław Przybysz
AU  - Oreste De Luca
AU  - Ying Wang
AU  - Pavel Dudin
AU  - José Avila
AU  - Jianting Ye
AU  - Paweł Dąbrowski
AU  - Paweł J. Kowalczyk
AU  - Jagoda Sławińska
AU  - Petra Rudolf
AU  - Antonija Grubišić-Čabo
PY  - 2026
DA  - 2026/10/23
PB  - arXiv
DO  - 10.48550/arxiv.2610.32714
UR  - https://arxiv.org/abs/2610.32714
AB  - The emergence of flat bands in twisted bilayer graphene at the so-called magic angle reveals a range of intriguing phases, such as superconductivity and Mott insulating states, resulting from electrons entering a correlated state. This establishes twisted bilayer graphene as an excellent platform for exploring correlation effects in many-body phases and across various twist angles. However, in most cases, the twist angle is not an easy parameter to control because it exhibits structural instabilities such as relaxation and reconstruction that reduce the correlation effects. Here, we report the unexpected appearance of a flat band at the \bar{M} point far from the Fermi level in a 2.4° twisted bilayer graphene, directly visualized by angle-resolved photoemission spectroscopy. Our work is the first observation of flat bands away from the \bar{K} point in twisted bilayer graphene and highlights the need to probe the entire Brillouin zone to fully capture electronic states in twisted structures.
ER  -