Fig. 2: Voltage–current characteristic in the presence of microwave radiation.
From: Missing Shapiro steps in topologically trivial Josephson junction on InAs quantum well
a–d Histogram of the Josephson junction voltage as a function of the microwave power (e–h) and width of the Shapiro steps as a function of the microwave power (i–l) for devices A1 and B at two different frequencies for each device. In both the histogram and the plot of the width of each step, counts are expressed in unit of the critical current of the junction in the absence of the microwave drive. In both devices, while at high frequencies all Shapiro steps are visible, at low frequency and low power, the first step appears to be strongly suppressed. The microwave power is normalized to the power required to observe the vanishing of the critical current.
