The Generalized Gutzwiller Method for n=>2 Correlated Orbitals: Itinerant Ferromagnetism in eg-bands

TL;DR

This paper applies a generalized Gutzwiller method to study ferromagnetism in extended Hubbard models with two eg orbitals, revealing notable differences from Hartree-Fock predictions.

Contribution

It introduces a generalized Gutzwiller approach for n≥2 orbitals and demonstrates its effectiveness in modeling itinerant ferromagnetism.

Findings

Significant differences from Hartree-Fock results

Enhanced understanding of ferromagnetic behavior in eg-bands

Validation of the generalized Gutzwiller method

Abstract

Using the generalized Gutzwiller method we present results on the ferromagnetic behavior of extended Hubbard models with two degenerate eg orbitals. We find significant differences to results obtained from Hartree-Fock theory.