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arXiv · 2008.01893

Spin-selective insulators in Bose-Fermi mixtures

R. Guerrero-Suarez·J. J. Mendoza-Arenas·R. Franco·J. Silva-Valencia
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Abstract

We investigate an imbalanced mixture composed of two-color fermions and scalar bosons in the hard-core limit, considering repulsive and attractive interspecies and intraspecies interactions. The interplay between commensurability, repulsive interactions and imbalance generates three insulating phases: a mixed Mott state and two spin-selective insulators characterized by the commensurability relations $\rho_B+\rho^{\uparrow,(\downarrow)}_F=1$. For an attractive coupling between fermions and bosons, we found the relations $\rho_B-\rho^{\uparrow,(\downarrow)}_F=0$ for the spin-selective insulators. State-of-the-art cold-atoms setups constitute ideal platforms to implement these unveiled insulating states and verify their commensurability relations.

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R. Guerrero-Suarez, J. J. Mendoza-Arenas, R. Franco, J. Silva-Valencia. 2020-08-05. Spin-selective insulators in Bose-Fermi mixtures. https://doi.org/10.1103/physreva.103.023304

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