DEFECT-LIKE NATURE OF THE INTERFACE IN AB CD-TYPE SUPERLATTICES/

Based on the calculation of lattice dynamic properties and observation of first-order Raman spectra for the Zn-Se localized microscopic inte rface mode of the (CdSe)(4)/(ZnTe)(4) superlattice, multiphonon (MP) R aman scattering of up to five orders has been observed. The linewidth variation with MP order and temperature as well as the frequency and i ntensity behavior with MP order can be interpreted by the anharmonic d ecay of the localized mode into extended band modes. These results sho w the defect like nature of interfaces in AB/CD-type superlattices.