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Relevance of phonon dynamics in strongly correlated systems coupled to phonons: A Dynamical Mean Field Theory analysis
Giorgio Sangiovanni, Massimo Capone, Claudio Castellani
The properties of the electron-phonon interaction in the presence of a sizable electronic repulsion at finite doping are studied by investigating the metallic phase of the Hubbard-…
Static vs. dynamical mean field theory of Mott antiferromagnets
G. Sangiovanni, A. Toschi, E. Koch +11
Studying the antiferromagnetic phase of the Hubbard model by dynamical mean field theory, we observe striking differences with static (Hartree-Fock) mean field: The Slater band is…
Pairing and polarization in systems with retarded interactions
S. Ciuchi, G. Sangiovanni, M. Capone
In a system where a boson (e.g, a phonon) of finite frequency is coupled to electrons, two phenomena occur as the coupling is increased: electron pairing and polarization of…
Phonon softening and dispersion in the 1D Holstein model of spinless fermions
C. E. Creffield, G. Sangiovanni, M. Capone
We investigate the effect of electron-phonon interaction on the phononic properties in the one-dimensional half-filled Holstein model of spinless fermions. By means of determinanta…