Band anticrossing in GaNxSb1−x

Abstract

Fourier transform infrared absorption measurements are presented from the dilute nitride semiconductor GaNSb with nitrogen incorporations between 0.2% and 1.0%. The divergence of transitions from the valence band to E− and E+ can be seen with increasing nitrogen incorporation, consistent with theoretical predictions. The GaNSb band structure has been modeled using a five-band k∙p Hamiltonian and a band anticrossing fitting has been obtained using a nitrogen level of 0.78eV above the valence band maximum and a coupling parameter of 2.6eV.