Direct Observation of Flat Bands in Near-Magic-Angle Twisted Bilayer CVD Graphene.
basic_science · Level V
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- Record sourced from PubMed, PMID 42505150.
- Also identified by DOI 10.1021/acs.nanolett.6c01400.
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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.