We report on the experimental realization of ultracold 174 Yb-7 Li (Boson-Boson) and 173 Yb-7 Li (Fermion-Boson) mixtures. They are loaded into three dimensional (3D) or one dimensional (1D) optical lattices that are species-selectively deep for the heavy Ytterbium (Yb) and shallow for the light bosonic Lithium (Li) component, realizing novel mixed dimensional systems. In the 1D optical lattice the band structure of 173 Yb is reconstructed in the presence of 7 Li. Spectroscopic measurements of the 174 Yb-7 Li mixture in the 3D lattice give access to the 174 Yb Mott-insulator structure. Ground state inter-species scattering lengths are determined to be |a bg ( 174 Yb-7 Li)| = (1.11 ± 0.17) nm and |a bg ( 173 Yb-7 Li)| = (1.16 ± 0.18) nm. The formation and characterization of an ultracold 173 Yb-7 Li mixture is a first step towards a possible realization of a topological px + i py superfluid in this system.

We present experimental results on the inelastic and elastic interspecies interactions between ytterbium (Yb) in the metastable 3 P2 state loaded into a deep optical lattice and spin polarized lithium (Li) in its ground state. Focusing on the mJ = 0 magnetic sublevel of Yb( 3 P2), bias magnetic fields between 20 G and 800 G are investigated and significantly enhanced inelastic collision rates with high magnetic fields are found. In addition, by direct spectroscopy of the Yb Mottinsulator immersed in the Li Fermi gas an upper boundary of the background scattering length of the Yb( 3 P2, mJ = 0)-Li( 2 S 1/2 , F = 1/2, mF = +1/2) system is estimated, revealing the absence of useful Feshbach resonances. These observations are qualitatively consistent with the theoretical calculations.

Experimentally the spin dependence of inelastic collisions between ytterbium (Yb) in the metastable P 3 2 state and lithium (Li) in the S 2 OPEN ACCESS RECEIVED