Raman Studies of Acoustical Phonons in Strained Hexagonal GaN/AlGaN Superlattices

Abstract

We report the first experimental observation of folded acoustical modes in strained hexagonal GaN/A1(x)Ga(1)(-x)N superlattices by Raman scattering. The dispersion of LA phonon branch was determined by using different scattering configurations. It was found that the zone center gap of folded phonon branch is beyond the instrumental resolution (approximately equal 0.5 cm (-1)) The sound velocity for GaN/A1(x)Ga(1)(-x)N SL with Al content x= 0.28 was found to be 8410 m/s.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADP013188

Entities

People

  • A. A. Klochikhin
  • A. N. Smirnov
  • I. E. Kozin
  • I. N. Goncharuk
  • V. Yu. Davydov

Organizations

  • Russian Academy of Sciences

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Backscattering
  • Crystal Lattice Vibrations
  • Crystal Lattices
  • Diffraction
  • Lattice Dynamics
  • Nanostructures
  • Optical Lattices
  • Phonons
  • Physics
  • Raman Scattering
  • Raman Spectra
  • Scattering
  • Spectra
  • Technical Information Centers
  • Waves
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Fluid Dynamics.
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  • Wave Propagation and Nonlinear Chaotic Dynamics.