37 citations · 63 across the 8 of their papers we have counts for
8 papers
Fermi surface renormalization and quantum confinement in the two-coupled chains model
Eberth Correa, Alvaro Ferraz
We address the problem of the Fermi surface renormalization and the quantum confinement regime (QCR) in the two coupled chains model(TCCM) of spinless fermions. We perform a self-c…
A functional generalization of the field-theoretical renormalization group approach for the single-impurity Anderson model
Hermann Freire, Eberth Corrêa
We apply a functional implementation of the field-theoretical renormalization group (RG) method up to two loops to the single-impurity Anderson model. To achieve this, we follow a…
Breakdown of the Fermi-liquid regime in the 2D Hubbard model from a two-loop field-theoretical renormalization group approach
Hermann Freire, Eberth Correa, Alvaro Ferraz
We analyze the particle-hole symmetric two-dimensional Hubbard model on a square lattice starting from weak-to-moderate couplings by means of the field-theoretical renormalization…
Renormalization group calculation of the uniform susceptibilities in low-dimensional systems
Hermann Freire, Eberth Correa, Alvaro Ferraz
We analyze the one-dimensional (1D) and the two-dimensional (2D) repulsive Hubbard models (HM) for densities slightly away from half-filling through the behavior of two central qua…
Short-Range Order in a Flat Two-Dimensional Fermi Surface
Eberth Correa, Hermann Freire, A. Ferraz
We present the two-loop renormalization group (RG) calculations of all the susceptibilities associated with the two-dimensional flat Fermi surface with rounded corners (FS). Our ap…
Insulating spin liquid in the lightly doped two-dimensional Hubbard model
Hermann Freire, Eberth Correa, Alvaro Ferraz
We calculate the charge compressibility and uniform spin susceptibility for the two-dimensional (2D) Hubbard model slightly away from half-filling within a two-loop renormalization…