Quasiparticle energies in GaAs and AlAs

Abstract
We calculate the quasiparticle band structures of GaAs and AlAs and compare them with previous experimental assignments. Generally good agreement is obtained, except for the L conduction-band minimum in AlAs, which is found to be 0.8±0.2 eV above the X minimum rather than 0.3 eV as found in the literature. A new interpretation of the experimental data is therefore proposed.