99 citations · 1.1k across the 76 of their papers we have counts for
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Antiferromagnetism in the 2D Hubbard model: phase transition and local quantities
Roland Muenzner, Adolfo Avella, Ferdinando Mancini
We present a first study of the antiferromagnetic state in the 2D t-t'-U model at finite temperatures by the composite operator method, providing simultaneously a fully self-consis…
New Comparisons for Local Quantities of the Two-Dimensional Hubbard Model
A. Avella, F. Mancini
We have compared the results of our approximation scheme, the composite operator method, for the double occupancy and the internal energy of the two-dimensional Hubbard model with…
The 2D Mott-Hubbard transition in presence of a parallel magnetic field
A. Avella, F. Mancini
The half-filled two-dimensional Hubbard model in presence of a uniform and static parallel magnetic field has been studied by means of the Composite Operator Method. A fully self-c…
Non-Ergodicity of the 1D Heisenberg Model
M. Bak, A. Avella, F. Mancini
The relevance of zero-energy functions, coming from zero-energy modes and present in the structure of bosonic Green's functions, is often underestimated. Usually, their values are…