Infrared absorption by graphene–hBN heterostructures

Abergel, David S. L. and Wallbank, John and Chen, Xi and Mucha-Kruczynski, Marcin and Falko, Vladimir (2013) Infrared absorption by graphene–hBN heterostructures. New Journal of Physics, 15 (12). ISSN 1367-2630

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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 moire 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.

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New Journal of Physics
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07 Feb 2014 13:13
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20 Sep 2023 00:35