The properties of a newly discovered photoluminescence recombination process which involved negatively charged donor ions, D-, were investigated in the presence of magnetic fields. The binding energies of D- singlet and triplet states were determined between 0 and 15T. This was the first conclusive evidence for the presence of D- triplet states in this system.

Magnetophotoluminescence of D- Singlet and Triplet States in GaAs D.A.Harrison, J.A.H.Stotz, V.A.Karasyuk, S.P.Watkins, M.L.W.Thewalt, D.J.S.Beckett, A.J.SpringThorpe: Physical Review B, 1999, 60[23], 15527-30