Microscopic calculations on Raman scattering from acousitc phonons confined in Si nanocrystals

TL;DR

This paper presents a microscopic lattice-dynamical calculation of Raman scattering from acoustic phonons in silicon nanocrystals, revealing differences between polarized and depolarized spectra and comparing results with experimental data.

Contribution

It introduces a detailed microscopic approach to analyze Raman scattering in silicon nanocrystals, highlighting the differences in spectra and discussing matrix effects.

Findings

Polarized spectra are more pronounced than depolarized ones.

Different acoustic phonons contribute to polarized and depolarized spectra.

Calculated results agree with recent experimental data.

Abstract

Raman scattering from the acoustic phonons confied in si nanocrystals is investigated by a microscopic lattice-dynamical calculation. Polarized and depolarized spectra are found to be rather different, indicated from different acoustic phonons. The polarized scattering is more pronounced than the depolarized one. The calculated results are compared with the recent experimental data. The matrix effects are discussed.