Feshbach Resonances in an Erbium-Dysprosium Dipolar Mixture

We report on the observation of heteronuclear magnetic Feshbach resonances inseveral isotope mixtures of the highly magnetic elements erbium and dysprosium.Among many narrow features, we identify two resonances with a width greaterthan one Gauss. We characterize one of these resonances, in a mixture of^168Er and ^164Dy, in terms of loss rates and elastic cross section,and observe a temperature dependence of the on-resonance loss rate suggestiveof a universal scaling associated with broad resonances. Our observations holdpromise for the use of such a resonance for tuning the interspecies scatteringproperties in a dipolar mixture. We further compare the prevalence of narrowresonances in an ^168Er-^164Dy mixture to the single-species case, andobserve an increased density of resonances in the mixture.