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- W2027069192 abstract "High germanium content ${mathrm{Si}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Ge}}_{mathit{x}}$ alloys have been grown pseudomorphically at 400 ifmmode^circelsetextdegreefi{}C on Ge (001) by molecular-beam epitaxy. The germanium fraction determined using x-ray diffraction measurements (x=0.8) is in good agreement with the value obtained with in situ x-ray photoemission results and vapor flux control. Combining Raman spectroscopy results and the epilayer stress value obtained by x-ray diffraction, we have determined the strain-shift coefficient (b) for each main Raman line (Ge-Ge, Si-Ge, and Si-Si). The variation of b is similar to the Gruneisen parameter (ensuremath{gamma}) alloy variation, i.e., b and ensuremath{gamma} values increase with increasing chemical disorder. The use of Raman scattering as a direct tool to determine the strain is discussed. The temperature dependence of the phonon frequencies has also been studied in the range from 300--5 K. textcopyright{} 1996 The American Physical Society." @default.
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- W2027069192 date "1996-03-15" @default.
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- W2027069192 title "Phonon strain-shift coefficients of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Si</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=italic>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ge</mml:mi></mml:mrow><mml…" @default.
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- W2027069192 doi "https://doi.org/10.1103/physrevb.53.6923" @default.
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