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HRTEM images of (a) sample A showing inclusions of in size. The inset shows a magnified image of an inclusion. (b) Sample B showing inclusions of about in size. Moiré pattern visible on the lower left side of the cluster is compatible with tetragonal metallic indium.
High resolution lattice image of an inclusion in sample A. The power spectra of selected areas as indicated show no additional spots, but a widening caused by strain in the inclusion is observed.
Simulated InN lattice image with a thickness of containing an indium inclusion of in the center. The Fourier transforms do not show additional diffraction spots due to the inclusion.
PL spectra measured in the samples A and B with In clusters sizes of and , respectively. Excitation is done by a line of a InGaAs laser, detection by a combination of InGaAs Hamamatsu and PbS detectors.
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