99 citations · 139 across the 9 of their papers we have counts for
18 papers
The Hubbard model within the equations of motion approach
F. Mancini, A. Avella
The Hubbard model has a special role in Condensed Matter Theory as it is considered as the simplest Hamiltonian model one can write in order to describe anomalous physical properti…
4-pole analysis of the two-dimensional Hubbard model
Satoru Odashima, Adolfo Avella, Ferdinando Mancini
The electronic states of the two-dimensional Hubbard model are investigated by means of a 4-pole approximation within the Composite Operator Method. In addition to the conventional…
The Hubbard model with intersite interaction within the Composite Operator Method
Adolfo Avella, Ferdinando Mancini
We study the one- and two- dimensional extended Hubbard model by means of the Composite Operator Method within the 2-pole approximation. The fermionic propagator is computed fully…
Effects of two-site composite excitations in the Hubbard model
A. Avella, F. Mancini, S. Odashima
The electronic states of the Hubbard model are investigated by use of the Composite Operator Method. In addition to the Hubbard operators, two other operators related with two-site…
The Hubbard model: bosonic excitations and zero-frequency constants
Adolfo Avella, Ferdinando Mancini
A fully self-consistent calculation of the bosonic dynamics of the Hubbard model is developed within the Composite Operator Method. From one side we consider a basic set of fermion…
The charge and spin sectors of the t-t' Hubbard model
Adolfo Avella, Ferdinando Mancini
The charge and spin sectors, which are intimately coupled to the fermionic one, of the t-t' Hubbard model have been computed self-consistently within the two-pole approximation. Th…