Figure 1 | Scientific Reports

Figure 1

From: Negative Quantum Capacitance Induced by Midgap States in Single-layer Graphene

Figure 1

(a) Schematic diagram of the Ag-adsorbed single-layer graphene capacitor.(b) An optical image of the Ag-adsorbed single-layer graphene capacitor device; dashed line represents the graphene flake and the scale bar is 5 μm. (c) Circuit diagram of the capacitance measurements of Y2O3 top-gated graphene devices. (d) Density plot of spectral function A (E,k) in k − E plane for impurity concentration ni = 1%, where a = 0.142 nm is the nearest-neighbor distance.

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