期刊
NEW JOURNAL OF PHYSICS
卷 15, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/15/12/123009
关键词
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资金
- CMTC-LPS-NSA
- US-ONR-MURI
- CDT NOWNANO
- EPSRC [EP/L013010/1]
- Royal Society Wolfson Research Merit Award
- ERC Adv Grant 'Graphene and Beyond'
- ERC Synergy Grant 'Hetero2D'
- EPSRC [EP/L013010/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/L013010/1] Funding Source: researchfish
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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