Table 1: Electronic band-gap energies at  K without SOC derived from experiment [55] and calculated at the LDA and LDA + G0W0 levels.

Energy gap (eV)GaP (exp.)GaP (LDA)GaP (G0W0)GaAs (exp)GaAs (LDA)GaAs (G0W0)

2.731.462.371.990.841.54
2.921.612.501.630.361.22
2.371.472.112.091.331.76