Supersolid in Bose-Bose-Fermi Mixtures subjected to a Square Lattice

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Two-component Bose condensates with repulsive interaction are stable when g 1 g 2<g 12² is satisfied. By tuning the interactions, we show that the instability corresponding to bose-bose phase separation always happens at a higher temperature than corresponding to bose-fermi phase separation happens. Moreover, we find both the transition temperature T DW of supersolid and the coherence peak at k DW are enhanced in the mixtures studied. These will make the observation of supersolid in experiments more reachable.