Figure 3. A gate-voltage induced magnetic flux.

(a) Colormap of V_M as a function of I_B and V_G, taken at B = 0 T. The critical current I_C is defined by the onset of a finite voltage state, indicated by the red regions. The Fabry-Perot modulation of the critical current (Fig. 2b) is visible as rapid fluctuations in I_C due to the large steps in V_G. The measurement is performed fast enough such that the magnetic field creep (Fig. 2c) can be neglected. (b) Same measurement taken at B = 250 mT. An additional approximately sinusoidal modulation of the critical current is seen with a gate periodicity of ΔV_G = 2.5 V.