8 citations · 14 across the 11 of their papers we have counts for
11 papers
Normal state electronic properties of LaOFBiS superconductors
J. D. Querales Flores, C. I. Ventura, R. Citro +1
A good description of the electronic structure of BiS-based superconductors is essential to understand their phase diagram, normal state and superconducting properties. To de…
s-wave superconductivity in the presence of local Coulomb correlations
A. A. Schmidt, J. J. Rodríguez-Núñez
We derive the superconductiong mean-field equations for an attractive interaction, V, in the s-wave channel when local Coulomb interactions are taken into account for any value of…
Comment on "Superconducting phases in the presence of Coulomb interaction: From weak to strong correlations''
J. J. Rodríguez-Núñez, A. A. Schmidt
We examine the paper basic equations of T. Domański and K.I. Wysokiński [Phys. Rev. B {\bf 59}, 173 (1999)], who calculated the critical superconducting temperature, T_c, in functi…
Evolution of One-Particle and Double-Occupied Green Functions for the Hubbard Model at Half-Filling With Lifetime Effects Within The Moment Approach
S. Schafroth, J. J. Rodríguez-Núñez
We evaluate the one-particle and double-occupied Green functions for the Hubbard model at half-filling using the moment approach of Nolting. Our starting point is a self-energy, $Σ…
Superconductivity in the Attractive Hubbard Model: The Double Hubbard--I Approximation
J. J. Rodríguez--Núñez, H. Ghosh
Using the Dyson equation of motion for both the diagonal one-particle Green function, and off--diagonal Green function, , at the level of the Hubbard--…
Metal-Insulator Transition in the Two-Dimensional Hubbard Model at Half-Filling with Lifetime Effects within the Moment Approach
J. J. Rodríguez-Núñez, S. Schafroth
We explore the effect of the imaginary part of the self-energy, , having a single pole, , with spectral weight, , and quasi-particle lifet…
Self-consistent calculation of particle-hole diagrams on the Matsubara frequency: FLEX approximation
J. J. Rodríguez-Núñez, S. Schafroth
We implement the numerical method of summing Green function diagrams on the Matsubara frequency axis for the fluctuation exchange (FLEX) approximation. Our method has previously be…
Some Global Properties of the Attractive Hubbard Model in the Superconducting Phase: T-Matrix Approximation in 2D
S. Schafroth, J. J. Rodriguez, H. Beck
We have applied the Fast Fourier transform (FFT), which allows to compute efficiently convolution sums, to solve the set of self-consistent T-matrix equations to get the Green func…
Moment Approach for the 2D Attractive Hubbard Model
J. J. Rodríguez-Núñez, C. E. Cordeiro, A. Delfino
We constructed the one-particle spectral functions (diagonal and off-diagonal) which reproduce BCS for weak coupling and which take into account the effect of correlations on super…
Evidence for a Pseudogap Above the Critical Temperature in the Attractive Hubbard Model
J. J. Rodríguez-Núñez, S. Schafroth, R. Micnas +3
We explore the effect of fluctuations for in the 2-D negative Hubbard model within the framework of the selfconsistent T-matrix formalism, which goes beyond the BCS ap…
Comment on "Evolution from BCS Superconductivity to Bose-Einstein Condensation: Role of the Parameter in Interpreting the Experimental Plot by Uemura et al.''}
J. J. Rodríguez-Núñez, S. Schafroth, T. Schneider +2
The problem of crossover from BCS to Bose-Einstein condensation has recently attracted considerable interest owing to the discovery of high- cuprates. Their short cohere…