Fig. 2
From: A ballistic graphene superconducting microwave circuit
Observation of the Josephson inductance of a ballistic graphene superconducting junction. a Differential resistance across the gJJ for a wide gate-voltage range. Dark blue denotes area of zero resistance. The device shows signatures of FP oscillations on the p-doped side. b Normal state resistance of the gJJ versus gate voltage. c Microwave spectroscopy of the device in the superconducting state versus gate voltage, plotted as the amplitude of the reflection coefficient |S11| after background subtraction. The graphene junction acts as a tunable inductor in the microwave circuit, resulting in a cavity frequency that is tuned with gate voltage. Inset: The resonance frequency oscillates in phase with the oscillations in a, b
