Theory of multiexciton complexes bound to donors in multivalley semiconductors

Abstract

We report a theory for bound multiexciton complexes (BMEC) associated with donors in multivalley semiconductors. The energy separations between the low-lying electronic states and the ground state are calculated in the Hartree-Fock approximation. By incorporating the effect of the anisotropic, multivalley band structures with interparticle interactions, we obtain energy separations in good agreement with the available experimental data. This agreement between theory and experiment suggests that the assignment of electrons and holes to single-particle states is a good description of the BMEC in multivalley semiconductors.