Ultracold heteronuclear fermi-fermi molecules.

  title={Ultracold heteronuclear fermi-fermi molecules.},
  author={Arne C. Voigt and Matthias Taglieber and L. C. Costa and Takatoshi Aoki and W. Wieser and Theodor W. H{\"a}nsch and K. Dieckmann},
  journal={Physical review letters},
  volume={102 2},
We report on the first creation of ultracold bosonic heteronuclear molecules of two fermionic species, 6Li and 40K, by a magnetic field sweep across an interspecies s-wave Feshbach resonance. This allows us to associate up to 4x10(4) molecules with high efficiencies of up to 50%. Using direct imaging of the molecules, we measure increased lifetimes of the molecules close to resonance of more than 100 ms in the molecule-atom mixture stored in a harmonic trap. 

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