title: Superfluid and insulating phases of fermion mixtures in optical lattices.
abstract: The ground state phase diagram of fermion mixtures in optical lattices is analyzed as a function of interaction strength, fermion filling factor, and tunneling parameters. In addition to standard superfluid, phase-separated or coexisting superfluid -- excess-fermion phases found in homogeneous or harmonically trapped systems, fermions in optical lattices have several insulating phases, including a molecular Bose-Mott insulator (BMI), a Fermi-Pauli (band) insulator (FPI), a phase-separated BMI-FPI mixture or a Bose-Fermi checkerboard (BFC). The molecular BMI phase is the fermion mixture counterpart of the atomic BMI found in atomic Bose systems, the BFC or BMI-FPI phases exist in Bose-Fermi mixtures, and lastly the FPI phase is particular to the Fermi nature of the constituent atoms of the mixture.
authors.affiliation: School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, USA.
authors.forename: M
authors.initials: M
authors.lastname: Iskin
authors.forename: C A R
authors.initials: CA
authors.lastname: Sá de Melo