Plasmons in Strongly Correlated Systems: Spectral Weight Transfer and Renormalized Dispersion

Plasmons in strongly correlated systems: spectral weight transfer and renormalized dispersion.

We study the charge-density dynamics within the two-dimensional extended Hubbard model in the presence of long-range Coulomb interaction across the metal-insulator transition point. To take into account strong correlations we start from self-consistent extended dynamical mean-field theory and include nonlocal dynamical vertex corrections through a ladder approximation to the polarization operat...

Spectral weight transfer in strongly correlated Fe1.03Te

The temperature dependence of the in-plane optical conductivity has been determined for Fe1.03Te above and below the magnetic and structural transition at TN 68 K. The electron and hole pockets are treated as two separate electronic subsystems: a strong, broad Drude response that is largely temperature independent, and a much weaker, narrow Drude response with a strong temperature dependence. S...

Transfer of spectral weight in spectroscopies of correlated electron systems.

We study the transfer of spectral weight in the photoemission and optical spectra of strongly correlated electron systems. Within the local impurity self-consistent approximation, that becomes exact in the limit of large lattice coordination, we consider and compare two models of correlated electrons, the Hubbard model and the periodic Anderson model. The results are discussed in regard to rece...

Spectral And Dynamical Properties Of Strongly Correlated Systems

Strongly correlated electron systems.