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

doi:10.1103/PhysRevLett.80.4807

Picosecond raman studies of the electron-phonon interactions in Al_xGa_1−xAs: Nonmonotonic dependence upon the alloy composition

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

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Abstract

The electron-longitudinal-optical- (LO-) phonon interaction in Al_xGa_1−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 language	English (US)
Pages (from-to)	4807-4810
Number of pages	4
Journal	Physical Review Letters
Volume	80
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.80.4807
State	Published - 1998

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.80.4807

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abstract = "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 Fr{\"o}hlich 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.",

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AU - Ferry, D. K.

AU - Salvador, A.

AU - Morkoc, H.

PY - 1998

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AB - 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.

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Picosecond raman studies of the electron-phonon interactions in Al_xGa_1−xAs: Nonmonotonic dependence upon the alloy composition

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