447 citations · 3.8k across the 103 of their papers we have counts for
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cond-mat.str-el2006★ 390 cited
Dynamical vertex approximation - a step beyond dynamical mean field theory
A. Toschi, A. A. Katanin, K. Held
We develop a diagrammatic approach with local and nonlocal self-energy diagrams, constructed from the local irreducible vertex. This approach includes the local correlations of dyn…
cond-mat.str-el2006★ 9 cited
Spectral functions of 2D systems with coupling of electrons to collective or localized spin degrees of freedom
A. A. Katanin, V. Yu. Irkhin
The spectral properties of itinerant 2D systems with (nearly) ferromagnetic ground state are studied within the spin-fermion and the classical s-d exchange models. While the former…