Phonons in Semiconductor Superlattices

  • M. Cardona
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 62)


The lattice dynamics of superlattices made out of tetrahedrally coordinated semiconductors (Ge-Si, GaAs-AlAs) is discussed with emphasis on the modes which can be observed by Raman and/or infrared spectroscopy. These phonons are classified into folded acoustic, confined optic, and interface modes. Particular attention is paid to the interface modes and the relation between their macroscopic and microscopic theoretical treatments. It is shown that interface modes are not new modes of polar superlattices but they arise from the conventional confined ones of odd order (especially m = 1) when their wave vector is tilted with respect to the growth axis.


Acoustic Phonon Electron Energy Loss Spectroscopy Interface Mode Envelope Function Angular Dispersion 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • M. Cardona
    • 1
  1. 1.Max-Planck-Institut für FestkörperforschungStuttgart 80Fed.Rep.of Germany

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