MAGNETOOPTICAL SPECTROSCOPY OF 2-DIMENSIONAL HOLES IN GAAS ALXGA1-XASSINGLE HETEROJUNCTIONS/

The energy spectrum of two-dimensional (2D) holes in a perpendicular m agnetic field is investigated in p-type GaAs/AlGaAs single heterojunct ions using a magneto-optical method based on the study of radiative re combination of 2D holes with photoexcited electrons bound to donors. A complex structure of both heavy- and light-hole energy levels is dire ctly observed in luminescence spectrum, and the magnetic-field depende ncies of the energy splittings between different quantum states of the 2D holes is studied using an analysis of circular polarization of the magnetoluminescence. The experimental results are compared with the e nergy spectrum of 2D holes calculated with the use of the 4x4 Luttinge r k.p Hamiltonian and a reasonable agreement is established.