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

Anisotropy Propa Acoustics 

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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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