5 citations · 32 across the 20 of their papers we have counts for
20 papers
Temperature dependence of the magnetic hyperfine field at an s-p impurity diluted in Ni
A. L. de Oliveira, C. M. Chaves, N. A. de Oliveira +1
We study the formation of local magnetic moments and magnetic hyperfine fields at an \textit{s-p} impurity diluted in intermetallic Laves phases compounds Ni ( = Nd, Sm…
Pseudogap and the specific heat of high T superconductors: a Hubbard model in a n-pole approximation
E. J. Calegari, A. C. Lausmann, S. G. Magalhaes +2
In this work the specific heat of a two-dimensional Hubbard model, suitable to discuss high- superconductors (HTSC), is studied taking into account hopping to first () and…
Interplay between condensation energy, pseudogap and the specific heat of a Hubbard model in a n-pole approximation
A. C. Lausmann, E. J. Calegari, S. G. Magalhaes +2
The condensation energy and the specific heat jump of a two-dimensional Hubbard model, suitable to discuss high- superconductors, is studied. In this work, the Hubbard model i…
Quantum and classical correlations and Werner states in finite spin linear arrays
P. R. Wells, C. M. Chaves, J. A. e. Castro +1
Pairwise quantum correlations in the ground state of a N-spins antiferromagnetic chain described by the Heisenberg model with nearest neighbor exchange coupling are investigated. B…
Specific heat of a non-local attractive Hubbard model
E. J. Calegari, C. O. Lobo, S. G. Magalhaes +2
The specific heat of an attractive (interaction ) non-local Hubbard model is investigated. We use a two-pole approximation which leads to a set of correlation functions. In pa…
Pseudogap and the specific heat of high superconductors
E. J. Calegari, S. G. Magalhaes, C. M. Chaves +1
The specific heat of a two dimensional repulsive Hubbard model with local interaction is investigated. We use the two-pole approximation which exhibits explicitly important correla…