Anisotropy of optical phonons in biaxially stressed zinc-blende- and diamond-type semiconductors and alloys

V. A. Volodin, V. A. Sachkov

Research output: Contribution to journalArticlepeer-review

Abstract

The splitting of long-wave optical phonons that arises in biaxially stressed zinc-blende- and diamond-type crystals due to violation of cubic symmetry in such crystals was studied both theoretically and experimentally (using micro-Raman technique). The anglular dispersion of optical phonons near the center of the Brillouin zone was calculated for split modes in biaxially stressed (001)-oriented films. The results obtained were used to analyze the effects due to strain and alloying on optical-phonon frequencies in stressed Ge, InGaAs and InAlAs films grown on GaAs (001) substrates. The developed approach permits a more precise determination of both the composition and the biaxial strain in AIIIBV alloy films based on an analysis of Raman spectra taken from such films.

Original languageEnglish
Article number413008
JournalPhysica B: Condensed Matter
Volume614
DOIs
Publication statusPublished - 1 Aug 2021

Keywords

  • 63.20.-e 78.30.-j
  • Phonons
  • Raman scattering
  • Solid alloys
  • Strain

OECD FOS+WOS

  • 2.02 ELECTRICAL ENG, ELECTRONIC ENG
  • 2.05 MATERIALS ENGINEERING
  • 1.03.UK PHYSICS, CONDENSED MATTER

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