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Effect of correlation between electronic and vibrational dephasing processes on Raman band shapes
Author(s) -
Torii Hajime,
Tasumi Mitsuo
Publication year - 1991
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.1250221102
Subject(s) - dephasing , raman spectroscopy , chemistry , molecular physics , molecular vibration , raman scattering , condensed matter physics , physics , optics
A theory for Raman band shapes is developed by using the stochastic model. The correlation between electronic and vibrational dephasing is taken into account explicitly. Raman bands become significantly asymmetric in the case of a strong correlation. The Raman band shape can therefore be used to estimate the extent of correlation between the electronic and vibrational dephasing processes. The fact that Raman bands are usually Lorentzian means that the two dephasing processes are not strongly correlated in many cases. The microscopic aspect of the dephasing processes is discussed.