Effect of temperature on Raman scattering in hexagonal ZnMgO for optoelectronic applications

J. F. Kong, W. Z. Shen, Y. W. Zhang, X. M. Li, Q. X. Guo

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We have carried out a detailed investigation of temperature-dependent micro-Raman scattering on hexagonal ZnMgO films with different Mg compositions (0-0.323). The phonon frequencies downshift and linewidths broadening of A1 [longitudinal optical (LO)] and E1(LO) modes can be well explained by a model involving the contributions of thermal expansion, lattice-mismatch-induced strain, and anharmonic phonon processes. We have elucidated the variation with Mg composition of the contribution of the three- and four-phonon processes in the anharmonic effect. The present work establishes an experimental base for the micro-Raman technique to monitor the local temperature during the ZnMgO-based device operation with a submicrometer spatial resolution.

Original languageEnglish
Pages (from-to)10-13
Number of pages4
JournalSolid State Communications
Volume149
Issue number1-2
DOIs
Publication statusPublished - 2009 Jan 1

Keywords

  • A. Thin films
  • C. Impurities in semiconductors
  • D. Anharmonicity
  • D. Phonons

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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