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

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

2012-04-09

arxiv.org/abs/1204.1783v1

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

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.

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