Exploring an ultracold fermi-fermi mixture: Interspecies feshbach resonances and scattering properties of Li6 and K40

Abstract

We report on the observation of Feshbach resonances in an ultracold mixture of two fermionic species, Li6 and K40. The experimental data are interpreted using a simple asymptotic bound state model and full coupled channels calculations. This unambiguously assigns the observed resonances in terms of various s- and p-wave molecular states and fully characterizes the ground-state scattering properties in any combination of spin states. © 2008 The American Physical Society.