We report on the observation of heteronuclear magnetic Feshbach resonances in several isotope mixtures of the highly magnetic elements erbium and dysprosium. Among many narrow features, we identify two resonances with a width greater than one Gauss. We characterize one of these resonances, in a mixture of ${}^{168}\mathrm{Er}$ and ${}^{164}\mathrm{Dy}$, in terms of loss rates and elastic cross section, and observe a temperature dependence of the on-resonance loss rate suggestive of a universal scaling associated with broad resonances. Our observations hold promise for the use of such a resonance for tuning the interspecies scattering properties in a dipolar mixture. We further compare the prevalence of narrow resonances in an ${}^{166}\mathrm{Er}-{}^{164}\mathrm{Dy}$ mixture to the single-species case, and observe an increased density of resonances in the mixture.

中文翻译：

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dy- di偶极混合物中的Feshbach共振

我们报告了在高磁元素和的几种同位素混合物中对异核磁Feshbach共振的观察。在许多狭窄特征中，我们确定了两个共振宽度大于一个高斯。我们将这些共振中的一种表征为${}^{168}尔$ 和 ${}^{164}镝$，就损耗率和弹性横截面而言，并观察到谐振损耗率的温度依赖性，这暗示了与广泛谐振相关的普遍尺度。我们的观察结果有望将这种共振用于调节偶极混合物中的种间散射特性。我们进一步比较了窄共振在${}^{166}尔-{}^{164}镝$ 混合到单一物种的情况，并观察到混合物中共振的密度增加。