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Evidence of quantum‐size effect and electron–phonon interactions in resonance Raman scattering spectra of semiconductor nanocrystals
Author(s) -
Baranov A. V.,
Bobovich Ya. S.,
Petrov V. I.
Publication year - 1993
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250241108
Subject(s) - raman spectroscopy , resonance (particle physics) , raman scattering , phonon , excitation , coherent anti stokes raman spectroscopy , semiconductor , molecular physics , x ray raman scattering , nanocrystal , materials science , spectral line , atomic physics , chemistry , condensed matter physics , physics , optics , nanotechnology , optoelectronics , quantum mechanics , astronomy
Abstract Raman spectra of II–VI semiconductor nanocrystals embedded in silicate glass matrices with near‐resonance and resonance excitation in the range of electron transitions between size‐quantized energy levels were studied. It is shown that only the transitions with angular momentum l = 0, 2 contribute to the resonance Raman enhancement. The influence of the electron–phonon interaction on the Raman excitation profiles of the LO phonons and elastic vibrations of nanocrystals is analysed. The effect of the matrix on the intensities and frequencies of the low‐frequency Raman (LFR) bands and the possibilities of determining the particle size determination using LFR spectra are discussed.