English: Tuning of Dirac matter: As the density of states is well defined, the density of states at the Fermi level (for fermionic Dirac matter) can be nicely tuned by shifting the chemical potential ${\displaystyle \mu }$. Additionally, introducing a mass term ${\displaystyle m}$ leads to a gap between the two cones and the dispersion becomes quadratic near ${\displaystyle k=0}$.