Direct observation of flat bands in near-magic-angle twisted bilayer CVD graphene
arXiv:2609.02403 · doi:10.1021/acs.nanolett.6c01400
Abstract
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.
References in corpus (14)
- Electric Field Effect in Atomically Thin Carbon Films
- The electronic properties of graphene
- Fractional Chern insulators in magic-angle twisted bilayer graphene
- Strong Inter-valley Electron-Phonon Coupling in Magic-Angle Twisted Bilayer Graphene
- High-quality electrical transport using scalable CVD graphene
- Fractional quantum Hall effect in CVD-grown graphene
- Observation of Coexisting Dirac Bands and Moiré Flat Bands in Magic-Angle Twisted Trilayer Graphene
- Helical trilayer graphene: a moiré platform for strongly-interacting topological bands
- Raman spectra of twisted bilayer graphene close to the magic angle
- Spectroscopy of the Fractal Hofstadter Energy Spectrum
- Growth and applications of two-dimensional single crystals
- Moiré-Induced Transport in CVD-Based Small-Angle Twisted Bilayer Graphene
- Independently Tunable Flat Bands and Correlations in a Graphene Double Moiré System
- Cryogenic shock exfoliation for ultrahigh mobility rhombohedral graphite nanoelectronics