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Next talk on Friday in 2 days by Patricia Pesch.
News 12.04.2024
New publication: Band gap formation in commensurate twisted bilayer graphene/hBN moiré lattices
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News 10.09.2020
New publication: Fractional quantum Hall effect in CVD-grown graphene
2D Materials 7, 041007 (2020) We show the emergence of fractional quantum Hall states in graphene grown by chemical vapor deposition (CVD) for magnetic fields from below 3 T to 35 T where the CVD-graphene was dry-transferred. Effective composite-fermion filling factors up to ν∗=4 are visible and higher order composite-fermion states (with four flux quanta attached) start to emerge at the highest fields. Our results show that the quantum mobility of CVD-grown graphene is comparable to that of exfoliated graphene and, more specifically, that the p/3 fractional quantum Hall states have energy gaps of up to 30 K, well comparable to those observed in other silicon-gated devices based on exfoliated graphene.