Extended Data Fig. 1: Simulated surface band dispersions in a wide frequency range. | Nature

Extended Data Fig. 1: Simulated surface band dispersions in a wide frequency range.

From: Topological negative refraction of surface acoustic waves in a Weyl phononic crystal

Extended Data Fig. 1

ac, The data are evaluated at kz = 0.5π/h for the three side surfaces XZ1, YZ1 and XZ2, respectively, the terminations of which are specified in the main text. Two gapless surface bands (green lines) traverse the two gaps between the lowest three projected bulk bands (grey regions). We focus on the lowest surface band in the main text.

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