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PR spectra of a MBE sample taken at different temperatures.
CB-VB (hh) critical point energies, as obtained from PR measurements on different samples (solid symbols) and the BAC model fitting (solid lines). The inset shows the values as obtained by SIMS and by BAC fitting.
PL spectra of a MBE sample taken at different temperatures.
PL and PR critical points energies of a sample for different temperatures.
Localization energy, deduced from the PL and PR energy difference, for samples with different nitrogen content (obtained by BAC fitting).
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