Bose-Fermi-Hubbard model at finite temperature

Details Bose-Fermi-Hubbard model at finite temperature Bose-Fermi-Hubbard model at finite temperature

2010-04-02

arxiv.org/abs/1004.0304v2

J. Phys.: Condens. Matter 22 (2010) 355601

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

The phase transitions at finite temperatures in the systems described by the Bose-Fermi-Hubbard model are investigated in this work in the framework of the selfconsistent random phase approximation. The case of the hard-core bosons is considered and pseudospin formalism is used. The density-density correlator is calculated in the random phase approximation and the possibilities of transitions from superfluid to supersolid phases are investigated. It is shown that the transitions between uniform and charge ordered phases can be of the second or the first order, depending on the system parameters.

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