Fig. 2: Vortex phase induced by 2D-PM.

a1–a10 The vortex phase vs. the vertical displacement ΔLy of the PB plates. b The dependence of the introduced topological charge vs. ΔLy.
a1–a10 The vortex phase vs. the vertical displacement ΔLy of the PB plates. b The dependence of the introduced topological charge vs. ΔLy.