Matteo Vandelli, Josef Kaufmann, Mohammed El-Nabulsi, Viktor Harkov, Alexander I. Lichtenstein, Evgeny A. Stepanov
SciPost Phys. 13, 036 (2022) ·
published 26 August 2022
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We present the multi-band dual triply irreducible local expansion (D-TRILEX)
approach to interacting electronic systems and discuss its numerical
implementation. This method is designed for a self-consistent description of
multi-orbital systems that can also have several atoms in the unit cell. The
current implementation of the D-TRILEX approach is able to account for the
frequency- and channel-dependent long-ranged electronic interactions. We show
that our method is accurate when applied to small multi-band systems such as
the Hubbard-Kanamori dimer. Calculations for the extended Hubbard, the
two-orbital Hubbard-Kanamori, and the bilayer Hubbard models are also
discussed.
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