Direct Observation of Flat Bands in Near-Magic-Angle Twisted Bilayer CVD Graphene
Advances in chemical vapor deposition (CVD) growth have driven graphene crystal quality to unprecedented levels, yet it is still unknown whether this route can realize the fragile flat-band and correlated states of the magic-angle (MA) twisted bilayer graphene (TBG). Here, we report on the experimental observation by room-temperature nano-angle-resolved photoemission spectroscopy (nano-ARPES) of flat bands in a TBG sample close to the MA, assembled via a grow-and-stack protocol based on low-pressure CVD of graphene on copper. Our study indicates electronic bands fully comparable to those measured in exfoliation-based samples and determines the size of the largest near-MA domain to be compatible with electronic transport experiments, motivating further experiments on flat-band physics in CVD-graphene.
Authors
- Marco Polini (ORCID: https://orcid.org/0000-0003-2217-7408)
- Stiven Forti (ORCID: https://orcid.org/0000-0002-8939-3175)
- Eli Rotenberg (ORCID: https://orcid.org/0000-0002-3979-8844)
- Sergio Pezzini (ORCID: https://orcid.org/0000-0003-4289-907X)
- Giulia Piccinini (ORCID: https://orcid.org/0000-0002-2902-1361)
- Fabio Beltram (ORCID: https://orcid.org/0000-0002-6081-436X)
- Camilla Coletti (ORCID: https://orcid.org/0000-0002-8134-7633)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- Chris M. Jozwiak (ORCID: https://orcid.org/0000-0002-0980-3753)
- Antonio Rossi (ORCID: https://orcid.org/0000-0003-4574-7215)
- Vaidotas Mišeikis (ORCID: https://orcid.org/0000-0001-6263-4250)
- Alex Boschi (ORCID: https://orcid.org/0000-0001-7562-7340)
- Lorenzo Cavicchi (ORCID: https://orcid.org/0009-0008-4504-9023)
- Gianluigi Baiardi
- Aaron Bostwick
Institutions
- University of Pisa (IT)
- Lawrence Berkeley National Laboratory (US)
- Scuola Normale Superiore (IT)
- National Institute for Materials Science (JP)
- Istituto Nanoscienze (IT)
- National Enterprise for NanoScience and NanoTechnology (IT)
- Center for Nanotechnology Innovation (IT)
Publication Details
- Journal
- Nano Letters
- Published
- 2026-07-27
- DOI
- https://doi.org/10.1021/acs.nanolett.6c01400
- Primary Topic
- Graphene research and applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency
- Core Research for Evolutional Science and Technology
- Advanced Light Source
- NextGenerationEU