41 citations · 412 across the 61 of their papers we have counts for
61 papers
Two-dimensional extended Hubbard model: doping, next-nearest neighbor hopping and phase diagrams
A Sherman
Using the strong coupling diagram technique, we investigate the extended Hubbard model on a two-dimensional square lattice. This approach allows for charge and spin fluctuations an…
Two-dimensional extended Hubbard model at half-filling
A. Sherman
We consider the extended Hubbard model on a two-dimensional square lattice at half-filling. The model is investigated using the strong coupling diagram technique. We sum infinite s…
Low-frequency magnetic oscillations induced by strongly electron correlations
Alexei Sherman
To explain the low frequencies of quantum oscillations observed in lightly doped cuprates, we consider the two-dimension Hubbard model supplemented with the perpendicular magnetic…
Magnetic properties and superconductivity in the two-dimensional repulsive Hubbard model
Alexei Sherman
A new method for estimating the parameter ensuring the fulfillment of the Mermin-Wagner theorem in the strong coupling diagram technique (SCDT) for the two-dimensional Hubbard mode…
Absence of superconductivity in the two-dimensional Hubbard model
A. Sherman
The possibility of the superconducting transition in the two-dimensional repulsive Hubbard model is studied using the ladder approximation of the strong coupling diagram technique.…
Phase separation and pairing fluctuations in oxide materials
A. Bill, V. Hizhnyakov, R. K. Kremer +3
We investigate the microscopic mechanism of charge instabilities and the formation of inhomogeneous states in systems with strong electron correlations. It is demonstrated that wit…