**3.2 Electronic band structure of diamond**

**Figure 3** shows the electronic band structure of diamond, whose unit cell is composed of two carbon atoms, located at the positions shown in Section 3.1. The band structure is plotted along the high-symmetry line ΓXWKL of the Brillouin zone. The x-axis represents the kpts = {'path' = 'ΓXWKL', 'npoints' = 60}, with 16 bands,

