Observation of short-order clustering effect in Cd1−xHgxTe

The infrared lattice-vibration reflection spectra of Cd_1-xHg_xTe (0?x?0.8) solid solution were measured. For the composition x from 0.1 to 0.6 on the top of the CdTe-like band one can observe considerable fine structure. To account for its nature the short-range clustering of the cations (Cd, Hg) around the anions (Te) characterized by parameter β was supposed. A good fit of the calculated and measured reflectively spectra was obtained provided the clustering parameter β = 0.6.