Temperature dependence of Raman scattering by acoustic phonons in a superlattice GaAs/AlGaAs in strong magnetic fields

D. N. Mirlin, I. A. Merkulov, V. I. Perel', I. I. Reshina, A. A. Sirenko, R. Planel

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We observed simultaneously two types of Raman spectra in a GaAs/AlGaAs superlattice under high magnetic field: a folded longitudinal acoustic phonon, IFA, and a structureless background, IB. The temperature dependence of the intensities in both spectra was studied in the range 2-100K and it was established that the background spectrum is due to the first-order Raman scattering from acoustic phonons with a wide range of wave vectors. We obtained the expression for the intensities ratio IB/IFA. It depends on the relationship between the homogeneous and the inhomogeneous broadening of the intermediate state of the photoexcited e-h pair. A rapid decrease of IB observed at T 30K is thought to be due to the increase of the homogeneous width with temperature.

Original languageEnglish (US)
Pages (from-to)1093-1097
Number of pages5
JournalSolid State Communications
Volume84
Issue number12
DOIs
StatePublished - Dec 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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