Engineering Superfluidity in Bose-Fermi Mixtures of Ultracold Atoms

Details Engineering Superfluidity in Bose-Fermi Mixtures of Ultracold Atoms Engineering Superfluidity in Bose-Fermi Mixtures of Ultracold Atoms

2004-10-20

arxiv.org/abs/cond-mat/0410494v3

Phys. Rev. A 72, (R)051604 (2005)

Physics

Condensed Matter

Superconductivity

Revised version with a new paragraph for system preparation

Scientific paper

10.1103/PhysRevA.72.051604

We investigate many-body phase diagrams of atomic boson-fermion mixtures loaded in the two-dimensional optical lattice. Bosons mediate an attractive, finite-range interaction between fermions, leading to fermion pairing phases of different orbital symmetries. Specifically, we show that by properly tuning atomic and lattice parameters it is possible to create superfluids with $s$-, $p$-, and d-wave pairing symmetry as well as spin and charge density wave phases. These phases and their stability are analyzed within the mean-field approximation for systems of $^{40}$K-$^{87}$Rb and $^{40}$K-$^{23}$Na mixtures. For the experimentally accessible regime of parameters, superfluids with unconventional fermion pairing have transition temperature around a percent of the Fermi energy.

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