Zeeman study of donor-acceptor pairs in ZnTe

The selective pair luminescence of donor-Li-acceptor pairs in ZnTe is investigated in an external magnetic field. A detailed study of the polarization-dependent absorption and emission of photons by donor-acceptor pairs with distinct pair separations simultaneously yields the Zeeman $g$-values of both ground and excited states of donors and acceptors, as well as the selection rules for absorption and emission of photons by the axial donor-acceptor complex. Information on localized ground-state and on delocalized excited-state wave functions in a magnetic field is obtained from the same experiment.