Picosecond raman studies of the electron-phonon interactions in AlxGa1−xAs: Nonmonotonic dependence upon the alloy composition

Kong-Thon Tsen, D. K. Ferry, A. Salvador, H. Morkoc

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The electron-longitudinal-optical- (LO-) phonon interaction in AlxGa1−xAs has been studied for the alloy composition ranging from 0.1 to 0.4 by picosecond Raman spectroscopy. We have found that the relative strength of the Fröhlich interaction of the two LO-phonon modes is a nonlinear function, and increases nonmonotonically with the Al composition. The possible origins of these novel results are discussed in terms of nonlinear dielectric theory and ordering in the alloy.

Original languageEnglish (US)
Pages (from-to)4807-4810
Number of pages4
JournalPhysical Review Letters
Issue number21
StatePublished - Jan 1 1998


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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