RAMAN-SCATTERING AND FAR-INFRARED REFLECTION-ABSORPTION SPECTRA OF THE 4-COMPONENT SOLID-SOLUTION ZNXCDYHG1-X-YTE

The Raman spectra for three compositions of ZnxCdyHg1-x-yTe (ZMCT) sol id solution were obtained at 300 K. The experimental method allowed us to observe TO-phonon lines. The comparison of the spectra for composi tions with x = 0.02, y = 0.7 and x = 0.12, y = 0.17 shows the appearan ce of additional lines at 163 and 175 cm(-1) besides two lines which a re observed in the range 120 to 150 cm(-1). Far Infrared Reflection Sp ectra (FIRS) were obtained for five compositions. Theoretical models f or three modes of the four-component solid solution were constructed f or the interpretation of the FIRS spectra of ZMCT. We obtained good ag reement between the results of RS and FIRS which allowed us to determi ne the LO- and TO-phonon frequencies for HgTe-, CdTe- and ZnTe-like la ttices.