Title: Bose-Fermi-Hubbard model on a lattice with two nonequivalent sublattices
Author(s):

T.S. Mysakovych (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 79011 Lviv, Ukraine )

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.

Key words: Bose-Fermi-Hubbard model, optical lattice, phase transitions
PACS: 37.10.Jk, 67.85.Pq, 71.10.Fd

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