Ov. Volkov et al., FREE AND LOCALIZED POSITIVELY CHARGED EXCITONS IN THE EMISSION-SPECTRUM OF GAAS ALGAAS QUANTUM-WELLS/, JETP letters, 68(3), 1998, pp. 236-242
The recombination emission spectra of an excitonic complex (A(0)X) loc
alized on a neutral acceptor, which have previously been attributed to
a positively charged exciton (X+), are investigated. Satellites arisi
ng around the main luminescence line as a result of recoil processes d
uring recombination of the complex which leave the surviving hole in a
n excited state are observed and investigated. It is shown in a comput
ational model based on the Luttinger Hamiltonian that the energy split
tings between the main line and the satellites correspond to an in-bar
rier impurity center located a definite distance from the well. It is
shown that as the magnetic field increases, a transition is observed f
rom the singlet ground state of the complex to a multiplet state. (C)
1998 American Institute of Physics.