Ultracold Heteronuclear Fermi-Fermi Molecules

Understand

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.