期刊
APPLIED PHYSICS LETTERS
卷 114, 期 11, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5088512
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资金
- National Natural Science Foundation of China [11335006]
- Fok Ying Tung Education Foundation
- U.S. Army Research Office under MURI [W911NF-17-1-0312]
- NSF NNCI Award [1542159]
- China Scholarship Council (CSC)
- PECASE award from the army research office
In this letter, van der Waals heterostructures (vdWHs) assembled by molybdenum disulfide (MoS2) and graphene monolayers are used as an experimental prototype to study the interaction between two-dimensional (2D) semiconducting and semimetal materials. The electron redistribution and energy transfer in graphene/MoS2 vdWHs are demonstrated by the combination of electrical measurements (Dirac-point shift) and Raman analyses. In graphene, the linear dispersive Dirac fermions can resonate with various-frequency photons, which emit from optically active MoS2 by the recombination of in-plane excitons. The experimental finding suggests that the photon-induced charge separation and accumulation might be in a low degree, thus affecting the performance of semiconductor/graphene-based 2D optoelectronic devices. Published under license by AIP Publishing.
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