Abstract
The infrared reflection spectra of Hg 1− x Mn x Te with x=0.02, 0.04, 0.08 and 0.10 have been measured at room temperature in the spectral region from 70 to 500 cm −1. The analysis of the far-infrared spectra was made by a fitting procedure based on the dielectric function which includes spacious distribution of free carrier influence on the plasmon–phonon interaction. The influence of energy gap opening (for x≈0.05) on far-infrared reflection spectra was analyzed. In spite of the strong plasmon–LO phonon interaction, we found that the long wavelength optical phonon modes of these mixed crystals showed a two-mode behavior. The model of phonon behavior based on Genzel’s model, was developed. This theoretical model shows very good agreement with experimental results.
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