Fig. 2. (Color online) First Brillouin zone and feature production for machine learning. (a) First Brillouin zone, where high-symmetry points are marked in red. The red lines indicate the momenta where the features are collected. (b--c) Feature production from the selected momenta. We used 128 energy grids and 128 momenta along the band paths. Three of them are shown in (b) and (c) for visualization purposes.
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