Superfluidity and density order in a bilayer extended Hubbard model

Article

关键词: QUANTUM IMPURITY MODELS;    MEAN-FIELD THEORY;    MONTE-CARLO;    SUPERCONDUCTIVITY;    SYSTEMS;    MOLECULES;    PHYSICS;    GASES;   

DOI  :  10.1103/PhysRevB.91.144510

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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