Low temperature properties of the fermionic mixtures with mass imbalance in optical lattice

Abstract

We study the attractive Hubbard model with mass imbalance to clarify low temperature properties of the fermionic mixtures in the optical lattice. By combining dynamical mean-field theory with the continuous-time quantum Monte Carlo simulation, we discuss the competition between the superfluid and density wave states at half filling. By calculating the energy and the order parameter for each state, we clarify that the coexisting (supersolid) state, where the density wave and superfluid states are degenerate, is realized in the system. We then determine the phase diagram at finite temperatures.

5 pages, 4 figures, accepted for publication in J. Phys. Soc. Jpn

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Cited by in corpus (5)

• Superconductivity in the two-band Hubbard model
• Hetero pairing and component-dependent pseudogap phenomena in an ultracold Fermi gas with mass imbalance
• Mott transitions in the Hubbard model with spatially-modulated interactions
• Mass-imbalance induced metal-insulator transition in a three-component Hubbard model
• Mass-Imbalanced Superconductivity in Effective Two-Channel Kondo Lattice