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(Color online) (a) PL signal intensity and (b) BS of PL as a function of annealing time (T ann = 750 °C) for SiO2 and SiNx capped samples. The inset shows a typical PL spectrum.
Ga 3d spectra for the SiO2- and SiNx-capped samples.
Highly surface sensitive Ga 2p 3/2 spectrum measured from the SiO2-capped, 1000 s annealed sample.
As 3d spectra for the SiO2- and SiNx-capped samples. Solid lines (dot lines) show the 3d 5/2 (3d 3/2) peaks of the doublet components.
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