4 papers
Charge order on a triangular lattice with Mott physics and arbitrary charge density
Aleksey Alekseev, Agnieszka Cichy, Konrad Jerzy Kapcia
Triangular-lattice systems attract a lot of attention due to various frustration-induced and strongly correlated effects. Here, we focus on the charge-ordering phenomenon by means…
Phase structure of the one-dimensional lattice gauge theory with second nearest-neighbor interactions
Yeimer Zambrano, Aleksey Alekseev, Konrad J. Kapcia +2
We investigate the ground-state phase diagram of a one-dimensional lattice gauge theory (LGT) model with hard-core bosons at half-filling, extending previous studies…
Charge-Ordered States and the Phase Diagram of the Extended Hubbard Model on the Bethe lattice
Aleksey Alekseev, Konrad Jerzy Kapcia
We study the extended Hubbard model (EHM) with both onsite Hubbard interaction and the intersite density-density interaction between nearest-neighbors using the standard Hartree me…
Particle-Hole Asymmetry and Pinball Liquid in a Triangular-Lattice Extended Hubbard Model within Mean-Field Approximation
Aleksey Alekseev, Agnieszka Cichy, Konrad Jerzy Kapcia
Recently, triangular lattice models have received a lot of attention since they can describe a number of strongly-correlated materials that exhibit superconductivity and various ma…