2001/11/15 by E. P. Pokatilov, S. N. Klimin, Vladimir M. Fomin +4 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Chalcogenide Semiconductor Thin Films #Gold and Silver Nanoparticles Synthesis and Applications #Quantum Dots Synthesis And Properties #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.65.075316
16 pages, 2 figures, E-mail addresses: [email protected], [email protected], [email protected], accepted for publication in Physical Review B
arxiv created 2001/11/15 · openalex publication_date 2002/02/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Multiphonon Raman scattering in semiconductor nanocrystals is treated taking into account both adiabatic and nonadiabatic phonon-assisted optical transitions. Because phonons of various symmetries are involved in scattering processes, there is a considerable enhancement of intensities of multiphonon peaks in nanocrystal Raman spectra. Cases of strong and weak band mixing are considered in detail. In the first case, fundamental scattering takes place via internal electron-hole states and is participated in by s and d phonons, while in the second case, when the intensity of the one-phonon Raman peak is strongly influenced by the interaction of an electron and of a hole with interface imperfections (e.g., with trapped charge), p phonons are most active. Calculations of Raman scattering spectra for CdSe and PbS nanocrystals give a good quantitative agreement with recent experimental results.