Time-Dependent Gutzwiller Theory for Multiband Hubbard Models

Details Time-Dependent Gutzwiller Theory for Multiband Hubbard Models Time-Dependent Gutzwiller Theory for Multiband Hubbard Models

2011-07-07

arxiv.org/abs/1107.1354v1

Phys. Rev. Lett. 107, 076402 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.107.076402

Based on the variational Gutzwiller theory, we present a method for the computation of response functions for multiband Hubbard models with general local Coulomb interactions. The improvement over the conventional random-phase approximation is exemplified for an infinite-dimensional two-band Hubbard model where the incorporation of the local multiplet-structure leads to a much larger sensitivity of ferromagnetism on the Hund coupling. Our method can be implemented into LDA+Gutzwiller schemes and will therefore be an important tool for the computation of response functions for strongly correlated materials.

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