74 citations · 335 across the 18 of their papers we have counts for
18 papers
Large- limit of the large- theory for the triangular antiferromagnet
Shang-Shun Zhang, E. A. Ghioldi, Yoshitomo Kamiya +3
Large- and large- theories (spin value and spinor component number ) are complementary, and sometimes conflicting, approaches to quantum magnetism. While large- spi…
Evolution of Nagaoka phase with kinetic energy frustrating hoppings
F. T. Lisandrini, B. Bravo, A. E. Trumper +2
We investigate, using the density matrix renormalization group, the evolution of the Nagaoka state with hoppings that frustrate the hole kinetic energy in the Hubba…
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…
Reliability of the one-crossing approximation in describing the Mott transition
V. Vildosola, L. V. Pourovskii, L. O. Manuel +1
We assess the reliability of the one-crossing approximation (OCA) approach in quantitative description of the Mott transition in the framework of the dynamical mean field theory (D…
Kondo physics in a Ni impurity embedded in O-doped Au chains
S. Di Napoli, M. A. Barral, P. Roura-Bas +3
By means of ab initio calculations we study the effect of O-doping of Au chains containing a nanocontact represented by a Ni atom as a magnetic impurity. In contrast to pure Au cha…
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…