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. 2016 Nov 11;7:13368. doi: 10.1038/ncomms13368

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Copyright © 2016, The Author(s)

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(a,b) The simulated pressure amplitude distributions when pseudo-spin-up and pseudo-spin-down acoustic one-way edge states are selectively excited. We can clearly observe the robustness of the edge states against the sharp bending of the boundaries. (c,d) The measured sound pressure distributions, corresponding to a and b, respectively. The operating frequency of sound is 7.46 kHz. The distance between neighbouring lattice rings is 2D.