Lattice dynamics and phase transitions in IV–VI compounds

  • W. Porod
  • P. Vogl
6. Lattice Dynamics and Phase Transition
Part of the Lecture Notes in Physics book series (LNP, volume 152)


A pseudopotential theory of the zone-center phonon spectrum is presented and applied to IV–VI compounds. All covalently bonded NaCL or CsCL type cubic, binary semiconductors are predicted to be candidates for ferroelectricity. The structural instabilities of IV–VI's are explained. We demonstrate that a large optical dielectric constant or a small energy gap does not imply soft phonons and vice versa.


Structural Instability Ferroelectric Phase Transition Bloch State Soft Phonon Binary Semiconductor 
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Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • W. Porod
    • 1
  • P. Vogl
    • 2
  1. 1.Department of Electrical EngineeringColorado State UniversityFort CoLLinsUSA
  2. 2.Institut Theoretische PhysikUniversitaet GrazGrazAustria

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