Fig. 2: AC Josephson effect.
From: Josephson detection of time-reversal symmetry broken superconductivity in SnTe nanowires
a In addition to the integer Shapiro steps, labeled in white, fractional Shapiro steps appear in between the integer ones in a plot of r(IDC, P). b r(IDC) (gray curve) and integrated voltage V(IDC) (blue curve) taken at an applied RF frequency f = 5 GHz, P = −11.8 dBm. The first 1/2 integer step occurs with nearly equal intensity to the first integer step.
