期刊
NATURE COMMUNICATIONS
卷 8, 期 -, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/ncomms15251
关键词
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资金
- Center for Precision Assembly of Superstratic and Superatomic Solids, an NSF MRSEC [DMR-1420634]
- FAME, one of six centers of STARnet, a Semiconductor Research Corporation programme - MARCO
- DARPA
- AMOS programme at SLAC National Accelerator Laboratory within the Chemical Sciences, Geosciences and Biosciences Division
- Columbia University
- Nanoelectronics and Beyond programme of the National Science Foundation [DMR-1124894]
- Nanoelectronics Research Initiative of the Semiconductor Research Corporation
- Science Without Borders programme of the Brazilian National Research Council (CNPq)
- Lemann Foundation
- Kwanjeong Educational Foundation
- National Science Foundation [DGE-1069240, DGE-1144155]
- Deutsche Forschungsgemeinschaft through the Emmy Noether Programme [CH 1672/1-1, GRK1570]
The ability to control the size of the electronic bandgap is an integral part of solid-state technology. Atomically thin two-dimensional crystals offer a new approach for tuning the energies of the electronic states based on the unusual strength of the Coulomb interaction in these materials and its environmental sensitivity. Here, we show that by engineering the surrounding dielectric environment, one can tune the electronic bandgap and the exciton binding energy in monolayers of WS2 and WSe2 by hundreds of meV. We exploit this behaviour to present an in-plane dielectric heterostructure with a spatially dependent bandgap, as an initial step towards the creation of diverse lateral junctions with nanoscale resolution.
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