On the basis of calculations of the lattice dynamic properties, and of observations of the first-order Raman spectra for the Zn-Se localized microscopic interface mode of the (CdSe)4/(ZnTe)4 superlattice, multi-phonon Raman scattering of up to 5 orders was studied. The line-width variation with multi-phonon order and temperature, as well as the frequency and intensity behavior with multi-phonon order, could be explained by anharmonic decay of the localized mode into extended band modes. It was concluded that the results demonstrated the defect-like nature of interfaces in AB/CD-type superlattices.

S.L.Zhang, C.L.Yang, Y.T.Hou, Y.Jin, Z.L.Peng, J.Li, S.X.Yuan: Physical Review B, 1995, 52[3], 1477-80