  We present a microscopic theory of the magnetic field induced mixing of
heavy-hole states +/- 3/2 in GaAs droplet dots grown on (111)A substrates. The
proposed theoretical model takes into account the striking dot shape with
trigonal symmetry revealed in atomic force microscopy. Our calculations of the
hole states are carried out within the Luttinger Hamiltonian formalism,
supplemented with allowance for the triangularity of the confining potential.
They are in quantitative agreement with the experimentally observed
polarization selection rules, emission line intensities and energy splittings
in both longitudinal and transverse magnetic fields for neutral and charged
excitons in all measured single dots.
