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Exciton broadening in WS2 /graphene heterostructures

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Hill, Heather M. ; Rigosi, Albert F. ; Raja, Archana ; Chernikov, Alexey ; Roquelet, Cyrielle ; Heinz, Tony F.
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Date of publication of this fulltext: 20 Mar 2019 13:12


We have used optical spectroscopy to observe spectral broadening of WS2 exciton reflectance peaks in heterostructures of monolayer WS2 capped with mono- to few-layer graphene. The broadening is found to be similar for the A and B excitons and on the order of 5-10 meV. No strong dependence on the number of graphene layers was observed within experimental uncertainty. The broadening can be ...


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