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Figure 9
The gapped linear dispersion [equation (3)[link]] (black line) is approximated by a parabola [equation (2)[link]] (dashed red line). The shaded areas indicate the error regions of this approximation. In green, we plot the non-gapped linear dispersion, to show the similarity to the square-root behaviour.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 59| Part 3| June 2026| Pages 783-798
https://doi.org/10.1107/S1600576726002049
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