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Underdoped cuprates phenomenology in the 2D Hubbard model within COM(SCBA)
Adolfo Avella, Ferdinando Mancini
The two-dimensional Hubbard model is studied within the Composite Operator Method (COM) with the residual self-energy computed in the Self-Consistent Born Approximation (SCBA). COM…
Exact solution of the one-dimensional spin- Ising model in magnetic field
A. Avella, F. Mancini
In this paper, we study the Ising model with general spin in presence of an external magnetic field by means of the equations of motion method and of the Green's function forma…
Bosonic sector of the two-dimensional Hubbard model studied within a two-pole approximation
Adolfo Avella, Ferdinando Mancini, Volodymyr Turkowski
The charge and spin dynamics of the two-dimensional Hubbard model in the paramagnetic phase is first studied by means of the two-pole approximation within the framework of the Comp…
Phase diagrams of half-filled 1D and 2D extended Hubbard model within COM
Adolfo Avella, Ferdinando Mancini
The half-filled extended Hubbard model, in one and two dimensions, is studied by means of the 2-pole approximation within the Composite Operator Method with the aim at improving th…