38 citations · 189 across the 9 of their papers we have counts for
9 papers
Multi-orbital two-particle self-consistent approach -- strengths and limitations
Jonas B. Profe, Jiawei Yan, Karim Zantout +2
Extending many-body numerical techniques which are powerful in the context of simple model calculations to the realm of realistic material simulations can be a challenging task. Re…
Improved effective vertices in the multi-orbital Two-Particle Self-Consistent method from Dynamical Mean-Field Theory
Karim Zantout, Steffen Backes, Aleksandar Razpopov +2
In this work we present a multi-orbital form of the Two-Particle Self-Consistent approach (TPSC), here the effective local and static irreducible interaction vertices are determine…
Two-Particle Self-Consistent method for the multi-orbital Hubbard model
Karim Zantout, Steffen Backes, Roser Valenti
One of the most challenging problems in solid state systems is the microscopic analysis of electronic correlations. A paramount minimal model that encodes correlation effects is th…
Non-local correlations in Iron Pnictides and Chalcogenides
Shinibali Bhattacharyya, Kristofer Björnson, Karim Zantout +6
Deviations of low-energy electronic structure of iron-based superconductors from density functional theory predictions have been parametrized in terms of band- and orbital-dependen…
Deconfinement of Mott Localized Electrons into Topological and Spin-Orbit Coupled Dirac Fermions
José M. Pizarro, Severino Adler, Karim Zantout +5
The interplay of electronic correlations, spin-orbit coupling and topology holds promise for the realization of exotic states of quantum matter. Models of strongly interacting elec…
Statistical Analysis of the Chern Number in the Interacting Haldane-Hubbard Model
Thomas Mertz, Karim Zantout, Roser Valentí
In the context of many-body interacting systems described by a topological Hamiltonian, we investigate the robustness of the Chern number with respect to different sources of error…
Effect of non-local correlations on the electronic structure of LiFeAs
Karim Zantout, Steffen Backes, Roser Valentí
We investigate the role of non-local correlations in LiFeAs by exploring an ab-initio-derived multi-orbital Hubbard model for LiFeAs via the Two-Particle Self-Consistent (TPSC) app…
Self-Energy Dispersion in the Hubbard Model
Thomas Mertz, Karim Zantout, Roser Valenti
We introduce the concept of self-energy dispersion as an error bound on local theories and apply it to the two-dimensional Hubbard model on the square lattice at half-filling. Sinc…
Superconductivity in correlated BEDT-TTF molecular conductors: critical temperatures and gap symmetries
Karim Zantout, Michaela Altmeyer, Steffen Backes +1
Starting from an {\it ab initio}-derived two-site dimer Hubbard hamiltonian on a triangular lattice, we calculate the superconducting gap functions and critical temperatures for re…