Journal of Physical Studies 10(1), 54–65 (2006) DOI: https://doi.org/10.30970/jps.10.54 RAMAN SCATTERING IN STRONGLY CORELATED ELECTRON SYSTEMS. STRONG COUPLING APPROXIMATION I. V. Stasyuk, T. S. Mysakovych Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii St., Lviv, UA-79011, Ukraine E-mail (T.S.Mysakovych): mtaras@icmp.lviv.ua

The microscopic approach based on presentating the polarizability operator using ‟unaveraged” Green's functions built on dipole moment operators is used to calculate the cross-section of Raman scattering. For the case of strong coupling approximation the relation of this method with the approach in which the so-called resonant and nonresonant contributions to scattering are explicitly separated is revealed. Contributions to the polarizability operator for the case of Falicov-Kimball model and pseudospin-electron model at weak pseudospin-electron interaction are analysed.

PACS number(s): 78.30.-j, 71.10.Fd, 71.10.-w, 71.27.+a

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