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. 2015 Oct 6;6:8260. doi: 10.1038/ncomms9260

Figure 5. Topological robustness of acoustic edge modes.

Figure 5

(a) A one-way (counterclockwise) edge mode propagates along different cuts of the acoustic graphene lattice, and flows around deliberately introduced defect (top zigzag cut) without backscattering and formation of standing-wave patterns. (b) Excitation of a one-way (counterclockwise) edge mode and its propagation (top subplot) along an irregularly shaped domain wall created by the reversal of the Doppler bias (bottom subplot).