Extended Data Fig. 2: Twist wall and near-surface twist disclinations of a fibre-like fragment.
From: Liquid crystal defect structures with Möbius strip topology
a, Schematic of a twist wall. The non-polar director field with head-tail symmetry is shown by cylinders that twist by 180°, matching the uniform unwound far-field background n0 along the z direction. b, Free energy density of an extended fibre-like fragment stabilized at an applied electric field in the cross-sectional plane perpendicular to the direction of translational invariance. The average free-energy density of the twisted region (region I) is lower than that of the unwound far-field background (region II) and is plotted relative to the far-field background. The increased values of free energy density in the middle of the twist wall is higher due to the contribution of the dielectric coupling term. c, Free energy density along x coordinate in the z-midplane marked in (b). The blue dashed line corresponds to the free energy density of the far-field background.
