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- W2034942849 abstract "We present an experimental and theoretical investigation of long-wavelength optical-phonon behavior in ${mathrm{Ga}}_{1ensuremath{-}x}{mathrm{In}}_{x}mathrm{As}$ alloys. We propose a model which accounts quantitatively for both phonon frequencies and Raman intensities. The transverse-optical-phonon behavior is shown to be determined by mass disorder and microscopic strains. It is shown that Raman scattering provides a means of measuring local bond distortions in mixed crystals. Coupling by the macroscopic ionic polarization is shown to determine the longitudinal optical-phonon behavior. The model accounts for the so-called anomalies of the Raman intensities and oscillator strengths observed in ${mathrm{Ga}}_{1ensuremath{-}x}{mathrm{In}}_{x}mathrm{As}.$ Our analysis is supported by a thorough Raman-scattering study. The frequencies, Raman intensities and symmetries of both the transverse- and longitudinal-optical modes have been determined accurately over the whole compositional range, by using different crystal orientations ([001], [110], and [111])." @default.
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- W2034942849 date "1998-10-15" @default.
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- W2034942849 title "Optical-phonon behavior in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ga</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>In</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant=normal>As</mml:mi><mml:mo>:</mml:mo></mml:math>The role …" @default.
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- W2034942849 doi "https://doi.org/10.1103/physrevb.58.10452" @default.
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