Now in Physical Review Letter!
In our Erbium experiment, we have created the first two component dipolar Fermi gas with tunable interactions. This paves the way to studies of BEC-BCS physics in presence of an unprecedented few-body scattering scenario, including anisotropic long-range dipolar interactions and anisotropic short-range interactions.
Employing a lattice-protection technique, we could selectively prepare deeply degenerate mixtures of the two lowest spin states of fermionic erbium with a controllable imbalance. We have studied their scattering properties and identified a comparatively broad interspin Feshbach resonance in the vicinity of which we can tune the interspin interaction from strongly attractive to strongly repulsive. The Fermi mixture shows a remarkable collisional stability in the strongly interacting regime, providing a first step towards studies of superfluid pairing in the celebrated BEC-BCS crossover, adding the exceptional few-body scattering scenario brought by magnetic Lanthanide atoms.