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- W2031129793 abstract "A comprehensive study of impurity-induced phonon disordering in ${mathrm{Cd}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Zn}}_{mathit{x}}$Te alloys is reported for a variety of samples (with composition ranging from x=0.005--0.5, and 1) by using far-infrared reflectivity and Raman-scattering spectroscopy. Substantial differences were noted among the various published values for the optical-phonon frequencies versus x. Contrary to an earlier Raman study on molecular-beam-epitaxy grown ${mathrm{Cd}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Zn}}_{mathit{x}}$Te/GaAs films, our results yield increases in the numbers of both the CdTe- and ZnTe-like TO phonons with x. A modified random-element isodisplacement model provides excellent fits to the optical phonons. The effects of impurity-induced phonon disordering are studied, within the band mode region, by using an average-t-matrix formalism. Unlike earlier speculations in which a gap mode in ZnTe:Cd lies near ensuremath{sim}140--145 ${mathrm{cm}}^{mathrm{ensuremath{-}}1}$, our theory predicts it to be at a higher frequency, ensuremath{sim}153 ${mathrm{cm}}^{mathrm{ensuremath{-}}1}$. Group-theoretical analysis suggests that the gap mode exhibits a triply degenerate vibrational state and it can be detected both by IR absorption and Raman-scattering spectroscopy." @default.
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- W2031129793 date "1993-12-15" @default.
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- W2031129793 title "Impurity-induced phonon disordering in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Cd</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>Zn</mml:mi></mml:mrow><…" @default.
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- W2031129793 doi "https://doi.org/10.1103/physrevb.48.17064" @default.
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