Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-08-18
Phys. Rev. B 71, 045120 (2005) (17 pages)
Physics
Condensed Matter
Strongly Correlated Electrons
(20 pages, 13 figures)
Scientific paper
10.1103/PhysRevB.71.045120
We solve for the electronic Raman scattering response functions on an infinite-dimensional hypercubic lattice employing dynamical mean field theory. This contribution extends previous work on the nonresonant response to include the mixed and resonant contributions. We focus our attention on the spinless Falicov-Kimball model, where the problem can be solved exactly, and the system can be tuned to go through a Mott-Hubbard-like metal-insulator transition. Resonant effects vary in different scattering geometries, corresponding to the symmetries of the charge excitations scattered by the light. We do find that the Raman response is large near the double resonance, where the transfered frequency is close to the incident photon frequency. We also find a joint resonance of both the charge-transfer peak and the low-energy peak when the incident photon frequency is on the order of the interaction strength. In general, the resonance effects can create order of magnitude (or more) enhancements of features in the nonresonant response, especially when the incident photon frequency is somewhat larger than the frequency of the nonresonant feature. Finally, we find that the resonant effects also exhibit isosbestic behavior, even in the A1g and B2g sectors, and it is most prominent when the incident photon frequency is on the order of the interaction energy.
Devereaux Thomas P.
Freericks James K.
Shvaika A. M.
Vorobyov O.
No associations
LandOfFree
Electronic Raman scattering in correlated materials: exact treatment of nonresonant, mixed, and resonant scattering with dynamical mean field theory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Electronic Raman scattering in correlated materials: exact treatment of nonresonant, mixed, and resonant scattering with dynamical mean field theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic Raman scattering in correlated materials: exact treatment of nonresonant, mixed, and resonant scattering with dynamical mean field theory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-595445