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- W2092242526 abstract "Epi-Ge/Pr2O3/Si(1 1 1) layer structures were studied by synchrotron grazing incidence diffraction to analyse the structural perfection of the top epi-Ge and the oxide buffer layer independently. The dominating features for the epi-Ge layer are pronounced streaks of diffuse scattering in the 1 1 1 directions that are caused by microtwins and stacking faults lying in the {1 1 1} glide planes 70.5° tilted to the wafer surface. It is confirmed that grains of type B orientation in the epi-Ge layer are located near the oxide–Ge interface only. The few nanometres thick Pr2O3 buffer layer shows similar streaks of diffuse scattering indicating a high concentration of structural defects in the tilted {1 1 1} planes. The relatively poor crystallographic quality of the oxide layer with an in-plane domain size of about 35 nm, a mosaicity of 0.7° and a strain variation of 0.8% is discussed as a possible reason for structural imperfections in the upper epi-Ge layer. Measurements on samples with different epi-Ge thicknesses show that the epi-Ge layer has no influence on the strain state of the Pr2O3 buffer layer." @default.
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- W2092242526 date "2009-10-22" @default.
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- W2092242526 title "Synchrotron x-ray characterization of structural defects in epi-Ge/Pr<sub>2</sub>O<sub>3</sub>/Si(1 1 1) layer stacks" @default.
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- W2092242526 doi "https://doi.org/10.1088/0022-3727/42/21/215411" @default.
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