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Raman scattering in InAsxSbyP1-x-y alloys grown by gas source MBE.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • K. J. Cheetham
  • A. Krier
  • I. I. Patel
  • F. L. Martin
  • J-S Tzeng
  • C-J Wu
  • H-H Lin
  • EPSRC Studentship for KJC (Funder)
<mark>Journal publication date</mark>2/03/2011
<mark>Journal</mark>Journal of Physics D: Applied Physics
Issue number8
Pages (from-to)085405
Publication StatusPublished
<mark>Original language</mark>English


The Raman spectra of quaternary InAsxSbyP1-x-y epitaxial layers nominally lattice-matched to (1 0 0) n-type InAs substrates are reported. The phonon peaks are identified for alloys covering a wide composition range extending into the miscibility gap. Three-mode behaviour was obtained across part of the composition range. InP-like longitudinal optical (LO) and transverse optical (TO) phonons were observed over the entire compositional range, but InAs-like LO phonons were only observed at high arsenic concentrations and no InSb-like TO phonons were observed. Disorder-related phonon peaks were obtained for alloy compositions within the miscibility gap.