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- W1965623093 abstract "Using photoreflectance (PR) spectroscopy, the temperature dependences of the ${mathit{E}}_{0}$ transition in bulk Ge and a (Si${)}_{mathit{m}}$/(Ge${)}_{mathit{n}}$ strained-layer superlattice (SLS) were measured at temperatures from 87 to 295 K. A rapid decrease in the PR amplitude with temperature was observed for the SLS as compared with the bulk Ge ${mathit{E}}_{0}$ transition. This decrease is explained by using a model relating the PR amplitude to minority-carrier lifetime. The overall temperature dependences of the measured PR amplitudes were found to be consistent with the assumptions of this model. The model implies that there may be a different trapping mechanism in the superlattice than in bulk Ge. Fits to the Varshni relation also indicate a different temperature dependence of the ${mathit{E}}_{0}$ transition energies in the SLS as compared with bulk Ge. The measured bulk germanium Varshni coefficients are found to be in reasonable agreement with the results of an earlier determination." @default.
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- W1965623093 date "1992-01-15" @default.
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- W1965623093 title "Temperature dependences of the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=italic>E</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>transitions in bulk Ge and a Ge-rich (Si<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mi mathvariant=italic>m</mml:mi></mml:mrow></mml:msub…" @default.
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- W1965623093 doi "https://doi.org/10.1103/physrevb.45.1712" @default.
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