Figure 4

(a) Skyrmionic configurations in domed-shaped nanodots of radius 40 nm and aspect ratios h/R = 0.875, 0.375 and 0.125. (b) Calculated 2D topological charge for nanodots of radii 40 nm and increasing aspect ratios, as a function of the coordinate z along the direction perpendicular to the dot basal plane. The grey dash line joins points of maximum topological charge in each curve. (c) Maximum 2D topological charge of the dome-shaped dots of increasing radii values, as a function of their aspect ratio.