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cond-mat.str-el1998
Dynamical electron correlations in metals: TB-LMTO and multiband Hubbard Hamiltonian
V. Drchal, V. Janis, J. Kudrnovsky
We study electronic properties of solids with correlated d electrons which could be described by a multiband Hubbard Hamiltonian in the weak-interaction case, . The one-elec…
cond-mat.str-el1998
Strongly correlated electrons: Dynamical vertex renormalization
Vaclav Janis
Single-band Hubbard model at criticality of the metal-insulator transition is studied using approximations derived from parquet theory. It is argued that only the electron-hole and…
cond-mat.str-el1998
Generating functional for the full parquet approximation
Vaclav Janis
Parquet diagrams sum self-consistently Feynman graphs for the vertex function with all two-particle multiple scatterings. We show how the complete parquet equations for the Hubbard…