where d N( ki , E j ) gives the number of SC bands crossing PC wave vector k i and energy level E j , which is shown as the scale bar in Figure . EBS is calculated along the special k-point paths in the Brillouin zone of Ba 2 CdP 2 . We use 40 interpolation points between each pair of high-symmetry k points of the PC. We also calculate the EBS with 20 interpolation points (see comparison in Figure ) to confirm that there are no interpolation artifacts. The EBSs are calculated using a modified version of the BandUP code.