3 papers
cond-mat.str-el2024
Quantum Phase Transitions in 2D--dimensional paramagnetic half--filled Hubbard model
N. I. Chashchin
We investigate the quantum phase transitions in strongly correlated electronic systems at by the example of the 2D Hubbard model. The model for numerical calculations were…
cond-mat.str-el2020
Localized excitons in 1D half-filled paramagnetic Hubbard model
N. I. Chashchin
By the example of the Hubbard model we analytically and numerically examine the formating and coexisting of localized electron--electron pairs (doublons) and localized electron--ho…
cond-mat.str-el2018
D--dimensional half--filled Hubbard model. Zero temperature paramagnetic solution
N. I. Chashchin
In this paper we investigate effects of a lattice dimension on strongly correlated electronic systems at . The model for numerical calculations is formalized in terms of the…