Resonant Raman scattering effects in a nestingdriven chargedensitywave insulator: Exact analysis of the spinless FalicovKimball model with dynamical meanfield theory
Abstract
We calculate the total electronic Raman scattering spectrum for a system with a charge density wave on an infinitedimensional hypercubic lattice. The problem is solved exactly for the spinless FalicovKimball model with dynamical meanfield theory. We include the nonresonant, mixed, and resonant contributions in three common experimental polarizations, and analyze the response functions for representative values of the energy of the incident photons. The complicated scattering response can be understood from the significant temperature dependence of the manybody density of states and includes a huge enhancement for photon frequencies near the chargedensitywave gap energy.
 Publication:

Physical Review B
 Pub Date:
 October 2010
 DOI:
 10.1103/PhysRevB.82.155115
 arXiv:
 arXiv:1006.1832
 Bibcode:
 2010PhRvB..82o5115M
 Keywords:

 71.10.Fd;
 71.45.Lr;
 78.30.j;
 Lattice fermion models;
 Chargedensitywave systems;
 Infrared and Raman spectra;
 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 13 pages, 8 figures