Superfluidity and Density Order in a Bilayer Extended Hubbard Model

Autor:	Vanhala, Tuomas I., Baarsma, Jildou E., Heikkinen, Miikka O. J., Troyer, Matthias, Harju, Ari, Törmä, Päivi
Rok vydání:	2014
Předmět:	Condensed Matter - Quantum Gases
Zdroj:	Phys. Rev. B 91, 144510 (2015)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.91.144510
Popis:	We use cluster 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. Comment: The published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1411.3541 Zobrazit plný text záznamu View this record from Arxiv