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TOTAL ELECTRONIC RAMAN SCATTERING IN THE
CHARGE-DENSITY-WAVE PHASE OF THE SPINLESS FALICOV--KIMBALL MODEL

O. P. Matveev^{1}, A. M. Shvaika^{1}, J. K. Freericks^{2}

^{1}Institute for Condensed Matter Physics of the National Academy
of Sciences of Ukraine,

1, Svientsitskii St., 79011 Lviv, Ukraine

^{2}Department of Physics, Georgetown University, Washington,
DC 20057, USA

The total electronic Raman scattering spectrum, including the nonresonant, mixed and
resonant components, is determined for the charge-density-wave
(CDW) phase of the spinless Falicov-Kimball model at half filling
within dynamical mean-field theory. Its frequency dependence is
investigated for different values of the energy of the incident
photons. The spectra reflect different structures in the density of
states and how they are modified by screening and resonance effects. The calculations are performed for the $B_{\rm 1g}$, $B_{\rm 2g}$
and $A_{\rm 1g}$ symmetries (which are typically examined in the
experiment). Our results for the resonance effects
of the Raman spectra, found by tuning the energy of the incident photons, give some information
about the many-body charge dynamics of the CDW-ordered phase.

PACS number(s): 71.10.Fd, 71.45.Lr, 78.30.-j

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