861 citations · 5.8k across the 80 of their papers we have counts for
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Excitonic instability and unconventional pairing in the nodal-line materials ZrSiS and ZrSiSe
M. M. Scherer, C. Honerkamp, A. N. Rudenko +3
We use a functional renormalization group (fRG) approach to investigate potential interaction-induced instabilities in a two-dimensional model for the Dirac nodal-line materials Zr…
Effective Ising model for correlated systems with charge ordering
E. A. Stepanov, A. Huber, A. I. Lichtenstein +1
Collective electronic fluctuations in correlated materials give rise to various important phenomena, such as existence of the charge ordering, superconductivity, Mott insulating an…
Effective Heisenberg model and exchange interaction for strongly correlated systems
E. A. Stepanov, S. Brener, F. Krien +3
We consider the extended Hubbard model and introduce a corresponding Heisenberg-like problem written in terms of spin operators. The derived formalism is reminiscent of Anderson's…