title: Degenerate Fermi gases of ytterbium.
abstract: Evaporative cooling was performed to cool fermionic 173Yb atoms in a crossed optical dipole trap. The large elastic collision rate leads to efficient evaporation and we have successfully cooled the atoms to 0.37+/-0.06 of the Fermi temperature, that is to say, to a quantum degenerate regime. In this regime, a plunge of evaporation efficiency was observed as a result of Fermi degeneracy.
authors.affiliation: Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Fukuhara
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Takasu
authors.forename: Mitsutaka
authors.initials: M
authors.lastname: Kumakura
authors.forename: Yoshiro
authors.initials: Y
authors.lastname: Takahashi