71 citations · 493 across the 36 of their papers we have counts for
4 papers · 1 filter
Four interacting spins: addition of angular momenta, spin-spin correlation functions, and entanglement
Raimundo R. dos Santos, Lucas Alves Oliveira, Natanael C. Costa
We study four spins on a ring coupled through competing Heisenberg interactions between nearest neighbors, , and next-nearest neighbors, . The spectrum is obtaine…
Magnetism and metal-insulator transitions in the anisotropic kagome lattice
Lucas O. Lima, Andressa R. Medeiros-Silva, Raimundo R. dos Santos +2
The interest in the physical properties of kagome lattices has risen considerably. In addition to the synthesis of new materials, the possibility of realizing ultracold atoms on an…
The half-filled extended Hubbard model on a square lattice: Phase boundaries from determinant quantum Monte Carlo simulations
Sebastião dos Anjos Sousa-Júnior, Natanael C. Costa, Raimundo R. dos Santos
The extended Hubbard model (EHM) describes fermions on a lattice coupled through on-site, , and first-neighbor, , interactions. In the context of high- cuprates, antifer…
Magnetic and singlet phases in the three-dimensional periodic Anderson Model
Wiliam S. Oliveira, Thereza Paiva, Richard T. Scalettar +1
Heavy fermion materials are compounds in which localized -orbitals hybridize with delocalized ones, leading to quasiparticles with large renormalized masses. The presence of…