Fig. 5.
Simulation of effect of junction asymmetry and field inhomogeneity. The width and field asymmetry dependence of the Fraunhofer pattern. a, b When a width asymmetry factor α is added to the model, we find that the signal becomes asymmetric between positive and negative Bz. Here, the amplitude of the left side lobes increases relative to the amplitude of the right side lobes. We used the values α = 0.3, 0.6 respectively. c, d When the asymmetry factor β is introduced to the model, the Fraunhofer patterns are shifted along Bz, which can be seen as a tilt introduced to the 2D differential resistance map. We used β = 0.01, 0.02 respectively