Impact of graphene quantum capacitance on transport spectroscopy
Impact of graphene quantum capacitance on transport spectroscopy
We demonstrate experimentally that graphene quantum capacitance ${C}_{\mathrm{q}}$ can have a strong impact on transport spectroscopy through the interplay with nearby charge reservoirs. The effect is elucidated in a field-effect-gated epitaxial graphene device, in which interface states serve as charge reservoirs. The Fermi-level dependence of ${C}_{\mathrm{q}}$ is manifested as an …