Figure 2: Schematic of Weyl points in Brillouin zone.
From: Symmetry-protected ideal Weyl semimetal in HgTe-class materials
The bulk Brillouin zone (BZ), and (001) and (010) surface BZs of HgTe. In the ideal Weyl semimetal phase of the strained HgTe, there are four pairs of ideal Weyl nodes in the bulk BZ, schematically shown as red (chirality +1) and blue (chirality −1) circles. The pink (yellow) plane is for the ky=0 (kx=0) plane. The projections of bulk Weyl nodes onto the (001) and (010) surface BZs are shown; there are four gapless points in the (001) surface BZ but six gapless points in the (010) surface BZ.
