Fig. 2: Bloch points associated with antimerons predicted by the phase-field simulations.
a The horizontal slice of the central layer of the PTO film overlaid with the isosurfaces of Pmag = 0.55 Ps (red). The close isosurfaces are associated with BP-M’s and most open isosurfaces BP-AM’s. b, c The zoom-in slices of the two antimerons marked by dashed boxes in a. The white and gray arrows show the polarization directions near and away from the antimerons, respectively. d–g The isosurface of Pmag = 0.3 Ps (d) and the slices perpendicular to the x (e), y (f), and z (g) axes for the antimeron in b. h–k The isosurface and the slices for the antimeron in c. The normalized polarization vectors are overlaid therein. l The isosurface of Pmag = 0.55 Ps (red) where the CCD- and DDC-type Bloch points are labeled by purple and yellow circles, respectively. The circles and diamonds represent BP-M’s and BP-AM’s, respectively. The black arrow labels the abnormal BP-AM and the dashed circles mark the antimerons not associated with Bloch points.
