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Charge fluctuations and electron-phonon interaction in the finite- Hubbard model
E. Cappelluti, B. Cerruti, L. Pietronero
In this paper we employ a gaussian expansion within the finite- slave-bosons formalism to investigate the momentum structure of the electron-phonon vertex function in the Hubbar…
Poor screening and nonadiabatic superconductivity in correlated systems
L. Boeri, E. Cappelluti, C. Grimaldi +1
In this paper we investigate the role of the electronic correlation on the hole doping dependence of electron-phonon and superconducting properties of cuprates. We introduce a simp…
Electron-phonon renormalization in small Fermi energy systems
E. Cappelluti, L. Pietronero
The puzzling features of recent photoemission data in cuprates have been object of several analysis in order to identity the nature of the underlying electron-boson interaction. In…
Comment on ``Electron-phonon Vertex in the Two-dimensional One-band Hubbard Model''
B. Cerruti, E. Cappelluti, L. Pietronero
In cond-mat/0306131 Huang {\em et al.} reported for the first time a numerical evidence for the predominance of small phonon momenta in the electron-phonon coupling induced by elec…
Band-filling effects on electron-phonon properties of normal and superconducting state
E. Cappelluti, S. Ciuchi, C. Grimaldi +1
We address the effect of band filling on the effective electron mass and the superconducting critical temperature in a electron-phonon system. We compare the vertex cor…