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arXiv · 1107.1354

Time-Dependent Gutzwiller Theory for Multiband Hubbard Models

E. v. Oelsen·G. Seibold·J. Buenemann
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Abstract

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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E. v. Oelsen, G. Seibold, J. Buenemann. 2011-07-07. Time-Dependent Gutzwiller Theory for Multiband Hubbard Models. https://doi.org/10.1103/physrevlett.107.076402

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