Fig. 5: Even-layer scenario.
From: Photonic axion insulator with non-coplanar chiral hinge transport
a Schematic of chiral transport in the 14-layer case. The top (bottom) layer is B-layer (A-layer). Hinges 7-8 are chiral (C7-C8), while hinges 1-2 are trivial (T1-T2). b Measured hinge dispersions (color scale). The bandgaps are delineated by white dashed lines.
