Bose-Fermi-Hubbard model on a lattice with two nonequivalent sublattices

TL;DR

This paper investigates phase transitions in a Bose-Fermi-Hubbard model on a lattice with two nonequivalent sublattices, focusing on hard-core bosons and the effects of anisotropic hopping on supersolid phase regions.

Contribution

It introduces a detailed analysis of phase diagrams for the Bose-Fermi-Hubbard model with two sublattices, highlighting the impact of anisotropic hopping on supersolid phases.

Findings

Supersolid phase region is reduced with anisotropic hopping.

Phase diagrams are constructed in terms of chemical potential and hopping parameters.

Hard-core bosons are used in the analysis.

Abstract

Phase transitions in systems described by Bose-Fermi-Hubbard model on a lattice with two nonequivalent sublattices are investigated in this work. The case of hard-core bosons is considered and pseudospin formalism is used. Phase diagrams are built in the plain of chemical potential of the bosons-bosonic hopping parameter. It is shown that in the case of anisotropic hopping, the region of the supersolid phase existence is possible for a smaller parameter space.