35 citations · 35 across the 1 of their papers we have counts for
7 papers
Lanczos transformation for quantum impurity problems in d-dimensional lattices: application to graphene nanoribbons
C. A. Busser, G. B. Martins, A. E. Feiguin
We present a completely unbiased and controlled numerical method to solve quantum impurity problems in d-dimensional lattices. This approach is based on a canonical transformation,…
Indications of Spin-Charge Separation at Short Distance and Stripe Formation in the Extended t-J Model on Ladders and Planes
G. B. Martins, J. C. Xavier, C. Gazza +2
The recently discussed tendency of holes to generate nontrivial spin environments in the extended two-dimensional t-J model (G. Martins, R. Eder, and E. Dagotto, Phys. Rev. B{\bf 6…
Stripes in the Ising Limit of Models for the Cuprates
G. B. Martins, C. Gazza, E. Dagotto
The hole-doped standard and extended t-J models on ladders with anisotropic Heisenberg interactions are studied computationally in the interval (, Ising;…
Hole-Pairs in a Spin Liquid: Influence of Electrostatic Hole-Hole Repulsion
C. Gazza, G. Martins, J. Riera +1
The stability of hole bound states in the t-J model including short-range Coulomb interactions is analyzed using computational techniques on ladders with up to sites.…
Diagonalization in Reduced Hilbert Spaces using a Systematically Improved Basis: Application to Spin Dynamics in Lightly Doped Ladders
E. Dagotto, G. B. Martins, J. Riera +2
A method is proposed to improve the accuracy of approximate techniques for strongly correlated electrons that use reduced Hilbert spaces. As a first step, the method involves a cha…
Hole-pair symmetry and excitations in the strong-coupling extended t-J_z model
R. M. Fye
We analytically calculate the ground state pairing symmetry and excitation spectra of two holes doped into the half-filled t-t'-t''-J_z model in the strong-coupling limit (J_z >> |…