Abstract
Results of ir and Raman investigations on trigonal layer-structured Si2Te3 single crystals are reported. The ir reflection spectrum withE⊥c exhibits seven reststrahl-like bands, whereas the corresponding spectrum withE∥c shows only one very small bump. Values forε 0 andε ∞ are given. The Raman spectra are very rich in structure and can only be interpreted qualitatively as being a mixture of single phonon lines and one- and two-phonon density-of-states contributions. One-phonon density-of-states effects are disorder-induced owing to the statistical occurrence of the Si atoms within the regular hexagonal Te sublattice.
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Zwick, U., Rieder, K.H. Infrared and Raman study of Si2Te3 . Z Physik B 25, 319–322 (1976). https://doi.org/10.1007/BF01315246
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DOI: https://doi.org/10.1007/BF01315246