Infrared absorption by graphene–hBN heterostructures

D S L Abergel, J R Wallbank, Xi Chen, M Mucha-Kruczynski, Vladimir I Fal'ko

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27 Citations (Scopus)
128 Downloads (Pure)

Abstract

We propose a theory of optical absorption in monolayer graphene–hexagonal boron nitride (hBN) heterostructures. In highly oriented heterostructures, the hBN underlay produces a long-range moiré superlattice potential for the graphene electrons which modifies the selection rules for absorption of incoming photons in the infrared to visible frequency range. The details of the absorption spectrum modification depend on the relative strength of the various symmetry-allowed couplings between the graphene electrons and the hBN, and the resulting nature of the reconstructed band structure.
Original languageEnglish
Article number123009
JournalNew Journal of Physics
Volume15
Issue number12
DOIs
Publication statusPublished - Dec 2013

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