Journal
PHYSICAL REVIEW B
Volume 64, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.64.073304
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Confinement effects on first-order and second-order Raman scattering in nanocrystalline silicon are presented. The average dimension of the nanocrystals has been determined by an analysis of the first-order Raman spectra using the phenomenological phonon confinement model. The second-order acoustic bands 2LA and 2TA do not seem to be influenced by confinement effects and are similar to those in the bulk. The second-order optic bands are broadened and shifted in comparison to those in the bulk. The ratio of the integrated intensities I(2TO)(int)/I(TO)(int) depends upon the nanocrystal size and varies between the crystalline and amorphous limits.
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