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. 2019 Dec 18;475(2232):20190313. doi: 10.1098/rspa.2019.0313

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© 2019 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 6. — (a) χ⁽¹⁾ and (b) χ⁽²⁾ in the first Brillouin zone, determined for different values of $\tilde{α}$ , as indicated in the legends. (Online version in colour.)