Charge Transfer in 1T-TaS2/Graphene Hybrid Structures Studied by Spatially Resolved Raman Spectroscopy

Graphene/1T–TaS2hybrid structures were measured using the Raman spectroscopy at room temper- ature. Spatially resolved Raman maps show that the region for which an effective graphene G band shift was observed correlates well with the tantalum disulfide flake, suggesting a change of the carrier concentration in graphene induced by 1T–TaS2. This effect was observed only for the sample exfoliated in vacuum, which signifies the necessity of preventing tantalum disulfide from oxidation during sample preparation.