46 citations · 139 across the 7 of their papers we have counts for
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Exactly solvable model of strongly correlated -wave superconductivity
Malte Harland, Sergey Brener, Mikhail I. Katsnelson +1
We present an infinite-dimensional lattice of two-by-two plaquettes, the quadruple Bethe lattice, with Hubbard interaction and solve it exactly by means of the cluster dynamical me…
Detecting quantum critical points in the Fermi-Hubbard model via complex network theory
Andrey A. Bagrov, Mikhail Danilov, Sergey Brener +3
A considerable success in phenomenological description of high-T superconductors has been achieved within the paradigm of Quantum Critical Point (QCP) - a parental state…
Josephson lattice model for phase fluctuations of local pairs in copper-oxide superconductors
Malte Harland, Sergey Brener, Alexander I. Lichtenstein +1
We derive an expression for the effective Josephson coupling from the microscopic Hubbard model. It serves as a starting point for the description of phase fluctuations of local Co…
Electronic correlations and competing orders in multiorbital dimers: a cluster DMFT study
Malte Harland, Alexander I. Poteryaev, Sergey V. Streltsov +1
We investigate the violation of the first Hund's rule in 4 and 5 transition metal oxides that form solids of dimers. Bonding states within these dimers reduce the magnetizati…
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…
Plaquette Valence Bond Theory of High-Temperature Superconductivity
M. Harland, M. I. Katsnelson, A. I. Lichtenstein
We present a strong-coupling approach to the theory of high-temperature superconductivity based on the observation of a quantum critical point in the plaquette within the t,t' Hubb…