Premium
First‐order resonant Raman scattering in mixed silver halides
Author(s) -
Koumvakalis N.,
von der Osten W.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220920212
Subject(s) - raman scattering , x ray raman scattering , scattering , phonon , raman spectroscopy , relaxation (psychology) , exciton , condensed matter physics , phonon scattering , silver halide , halide , materials science , momentum (technical analysis) , molecular physics , chemistry , physics , optics , inorganic chemistry , nanotechnology , finance , economics , psychology , social psychology , layer (electronics)
Experiments of resonant Raman scattering in mixed crystals of AgBr:AgCl at low temperatures are performed. The spectra of the mixed crystals differ in a qualitative fashion from the spectra of pure AgBr. In particular, strong first‐order resonant Raman scattering is reported hitherto not observed. The results can be interpreted in terms of a relaxation in the momentum conservation caused by the perturbing system. Intervalley scattering by TA(X) and LA(X) phonons and intraband scattering by LO(Γ) phonons are found to be effective relaxation mechanisms for the exciton.