Abstract
AbstractRecent magneto‐optical results obtained in the energy range 100 to 170 meV, for ϵ ‖ c and H ⊥ c, are reported and analysed. Transitions of holes from acceptor states and transitions of holes from the first Landau level of the M band to the quantum levels of the M′1 band are identified by investigating the temperature dependence of the magnetoabsorption lines between 2 and 10°K. Calculations of the energies and intensities of the intervalence band magneto‐optical transitions are performed. The comparison of theoretical and experimental data enables one to determine the parameters of the valence band. The fine structure of magnetoabsorption spectra investigated by wavelength modulation technique indicates the existence of several impurity states. The binding energy of the acceptor ground state is estimated to be about 1.4 meV.
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