Pressure dependence of the fano asymmetry of optical phonons in Zn1 - xCoxSe and Zn1 - xFexSe

J. Bak, U. Venkateswaran, Chee Leung Mak, R. Sooryakumar, B. T. Jonker

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

Effects of hydrostatic pressure on the optical phonons in ZnSe doped with Co and Fe at 10 K and up to 5 GPa are presented. Raman spectra from Zn1 - xCoxSe (x = 1.6%) show the LO phonon developing an asymmetry with increasing pressure while the asymmetry already present at 1 bar in the x = 7.4% sample increases slightly with pressure. The optical phonon in Zn1 - xFexSe (x = 8.8%) shows no modifications to its line profile for all pressures. These results are discussed in terms of a coupling between the phonons and a Raman continuum that is thought to arise through a pressure tunable p-d hybridization of the low lying crystal field levels and the valence band.
Original languageEnglish
Pages (from-to)563-566
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume56
Issue number3-4
DOIs
Publication statusPublished - 1 Jan 1995
Externally publishedYes

Keywords

  • A. semiconductors
  • C. high pressure
  • C. Raman spectroscopy
  • D. phonons

ASJC Scopus subject areas

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

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