Nonresonant Raman and inelastic X-ray scattering in the charge-density-wave phase of the spinless Falicov-Kimball model

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dc.creatorMatveev, O. P.
dc.creatorShvaika, A. M.
dc.creatorFreericks, J. K.
dc.date2008-09-30
dc.date2009-03-31
dc.date.accessioned2026-07-07T12:57:58Z
dc.date.available2026-07-07T12:57:58Z
dc.descriptionNonresonant inelastic light and X-ray scattering is investigated for the spinless Falicov-Kimball model on an infinite-dimensional hypercubic lattice with a charge-density-wave phase at half filling. The many-body density of states (DOS) is found for different values of the Coulomb repulsion $U$, ranging from a dirty metal to a Mott insulator. At zero temperature, the charge gap is exactly equal to $U$; increasing the temperature rapidly fills the gap with subgap states. The nonresonant response function for Raman and inelastic X-ray scattering shows peaks connected with transitions over the gap and transitions that involve subgap states. In the case of X-ray scattering (when both energy and momentum are transferred), the response function illustrates features of dynamical screening (vertex corrections) in the different (nonresonant) symmetry channels ($A_{\rm 1g}$ and $B_{\rm 1g}$). We also derive and verify the first moment sum rules for the (nonresonant) Raman and inelastic X-ray response functions.
dc.description19 pages, 17 figures
dc.identifierhttps://arxiv.org/abs/0809.5284
dc.identifierhttp://arxiv.org/abs/0809.5284
dc.identifierPhys. Rev. B 79, 115130 (2009) [17 pages]
dc.identifierdoi:10.1103/PhysRevB.79.115130
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/225092
dc.subjectStrongly Correlated Electrons
dc.titleNonresonant Raman and inelastic X-ray scattering in the charge-density-wave phase of the spinless Falicov-Kimball model
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