52 citations · 108 across the 4 of their papers we have counts for
4 papers
Qualitative breakdown of the non-crossing approximation for the symmetric one-channel Anderson impurity model at all temperatures
C. N. Sposetti, L. O. Manuel, P. Roura-Bas
The Anderson impurity model is studied by means of the self-consistent hybridization expansions in its non-crossing (NCA) and one-crossing (OCA) approximations. We have found that…
Classical Antiferromagnetism in Kinetically Frustrated Electronic Models
C. N. Sposetti, B. Bravo, A. E. Trumper +2
We study the infinite U Hubbard model with one hole doped away half-filling, in triangular and square lattices with frustrated hoppings that invalidate Nagaoka's theorem, by means…
Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets
A. Mezio, C. N. Sposetti, L. O. Manuel +1
We study the occurrence of symmetry breakings, at zero and finite temperatures, in the J_1-J_3 antiferromagnetic Heisenberg model on the square lattice using Schwinger boson mean f…
A test of the bosonic spinon theory for the triangular antiferromagnet spectrum
A. Mezio, C. N. Sposetti, L. O. Manuel +1
We compute the dynamical structure factor of the spin-1/2 triangular Heisenberg model using the mean field Schwinger boson theory. We find that a reconstructed dispersion, resultin…