The density of states for gallium arsenide (zincblende structure) was calculated using the program Quantum Espresso (version 5.3.0).
The parameters for GaAs were taken from the following sites:
Bandgap in detail:
The calculated bandgap has a value of about 0.56 eV in comparison to a measured value of 1.424 eV (cf. reference value). The plots were not adjusted to the right bandgap.
E [eV] D(E) [unitcell-1eV-1]