3 papers
cond-mat.str-el2002
Similarities between the and Hubbard models in weakly correlated regimes
Marie-Bernadette Lepetit, Marie-Liesse Doublet, Philippe Maurel
We present a comparative study of the Hubbard and models far away from half-filling. We show that, at such fillings the Hamiltonian can be seen as an effective model of…
cond-mat.str-el2001
Effect of nearest neighbor repulsion on the low frequency phase diagram of a quarter-filled Hubbard-Holstein chain
Philippe Maurel, Marie-Bernadette Lepetit
We have studied the influence of nearest-neighbor (NN) repulsion on the low frequency phase diagram of a quarter-filled Hubbard-Holstein chain. The NN repulsion term induces the ap…
cond-mat.str-el2000
Optical phonons in a quarter-filled 1D Hubbard model
Philippe Maurel, Marie-Bernadette Lepetit
The influence of dispersion-less quantum optical phonons on the phase diagram of a quarter-filled Hubbard chain is studied using the Density-matrix renormalization group technique.…