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Anharmonic Decay of High-Energy LA Phonons

  • S. Tamura
  • K. Okubo
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 51)

Abstract

We discuss the effects of lattice dispersion upon the anharmonic decay of high-energy LA phonons in Ge. At frequencies higher than 2 THz the density of two-phonon final states increases more rapidly than v 2, suggesting that the spontaneous decay rate of the LA phonons depends on the frequency more strongly than v 5. The spatial anisotropy of the decay time is also remarked.

Keywords

Spatial Anisotropy Lattice Dispersion Spontaneous Decay Rate Continuum Elasticity Theory Isotopic Disorder 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1984

Authors and Affiliations

  • S. Tamura
    • 1
  • K. Okubo
    • 1
  1. 1.Department of Engineering ScienceHokkaido UniversitySapporo 060Japan

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