3 papers
cond-mat.str-el2026
Three-dimensional repulsive Hubbard model
Alexei Sherman
The three-dimensional repulsive Hubbard model is investigated using the strong-coupling diagram technique. For half-filling, the boundary between paramagnetic and antiferromagnetic…
cond-mat.str-el2024
Density of states of the Hubbard model supplemented with the quantizing magnetic field
Alexei Sherman
Using the strong coupling diagram technique, we calculate the zero-temperature density of states of electrons on a square lattice immersed in a perpendicular uniform magnetic f…
cond-mat.str-el2024
Hubbard model on a triangular lattice at finite temperatures
A. Sherman
Using the strong coupling diagram technique, we find three phases of the half-filled isotropic Hubbard model on a triangular lattice at finite temperatures. The weak-interaction ($…