20 citations · 40 across the 4 of their papers we have counts for
5 papers
Role of dynamical non-double-occupancy excitations on the quasiparticle damping of the model in the large- limit
A. Foussats, A. Greco, M. Bejas
One-electron self-energy in the - model was computed using a recently developed large- method based on the path integral representation for Hubbard operators. One of the m…
Charge order and phonon renormalizations: Possible implications for cobaltates
M. Bejas, A. Greco, A. Foussats
Several experimental and theoretical studies in cobaltates suggest the proximity of the system to charge ordering (CO). We show, qualitatively, in the frame of a model couple…
Electron-phonon interaction dressed by electronic correlations near charge ordering as the origin for superconductivity in cobaltates
A. Foussats, A. Greco, M. Bejas +1
We consider possible routes to superconductivity in hydrated cobaltates Na_xCoO_2.yH_2O on the basis of the t-J-V model plus phonons on the triangular lattice. We studied the stabi…
One-electron self energies and spectral functions for the t-J model in the large-N limit
M. Bejas, A. Greco, A. Foussats
Using a recently developed perturbative approach, which considers Hubbard operators as fundamental excitations, we have performed electronic self-energy and spectral function calcu…
Cooperative effect of phonons and electronic correlations for superconductivity in cobaltates
A. Foussats, A. Greco, M. Bejas +1
We propose that unconventional superconductivity in hydrated sodium cobaltate results from an interplay of electronic correlations and electron-phonon interactions. On…