Superfluidity and Density Order in a Bilayer Extended Hubbard Model

Research output: Contribution to journalArticle


Research units

  • Swiss Federal Institute of Technology Zurich


We use cellular dynamical mean-field theory to study the phase diagram of the square lattice bilayer Hubbard model with an interlayer interaction. The layers are populated by two-component fermions, and the densities in both layers and the strength of the interactions are varied. We find that an attractive interlayer interaction can induce a checkerboard density-ordered phase and superfluid phases, with either interlayer or intralayer pairing. Remarkably, the latter phase does not require an intralayer interaction to be present: it can be attributed to an induced attractive interaction caused by density fluctuations in the other layer.


Original languageEnglish
Article number144510
Pages (from-to)1-8
Number of pages8
JournalPhysical Review B
Issue number14
Publication statusPublished - Apr 2015
MoE publication typeA1 Journal article-refereed

    Research areas

  • bilayer Hubbard model, cold quantum gases, superfluidity

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