Trapping Fermionic $^{40}$K and Bosonic $^{87}$Rb on a Chip
  We demonstrate the loading of a Bose-Fermi mixture into a microfabricated magnetic trap. In a single-chamber vacuum system, laser-cooled atoms are transported to the surface of a substrate on which gold wires have been microfabricated. The magnetic field minimum formed near these current-carrying wires is used to confine up to $6\times10^4$ neutral $^{40}$K atoms. In addition, we can simultaneously load $2 \times 10^5$ $^{87}$Rb atoms, demonstrating the confinement of two distinct elements with such a trap. In a sequence optimized for $^{87}$Rb alone, we observe up to $1 \times 10^7$ trapped atoms. We describe in detail the experimental apparatus, and discuss prospects for evaporative cooling towards quantum degeneracy in both species. 
S. Aubin, M. H. T. Extavour, S. Myrskog, L. J. LeBlanc, J. Esteve, S.   Singh, P. Scrutton, D. McKay, R. McKenzie, I. D. Ler...