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. 2018 Jul 25;474(2215):20180132. doi: 10.1098/rspa.2018.0132

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© 2018 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 12. — Displacement field in the homogeneous triangular lattice (ε = 1) produced by a time-harmonic displacement, having a frequency (a) lower and (b) higher than the frequency at the Dirac point (figure 9f ). In both cases, the absolute value of the spinner constant is |α| = 0.9. (Online version in colour.)