Feshbach spectroscopy of ultracold mixtures of ${}^6\mathrm{Li}$ and ${}^{164}\mathrm{Dy}$ atoms

Abstract

We report on the observation of Feshbach resonances in ultracold ${}^6\mathrm{Li}$-${}^{164}\mathrm{Dy}$ mixtures, where ${}^6\mathrm{Li}$ atoms are respectively prepared in their three lowest spin states, and ${}^{164}\mathrm{Dy}$ atoms are prepared in their lowest energy state. We observe 21 interspecies scattering resonances over a magnetic field range from 0 to \SI{702}{\gauss} using atom loss spectroscopy, three of which exhibit relatively broad widths. These broad resonances provide precise control over the interspecies interaction strength, enabling the study of strongly interacting effects in ${}^6\mathrm{Li}$-${}^{164}\mathrm{Dy}$ mixtures. Additionally, we observe a well-isolated interspecies resonance at 700.1 G, offering a unique platform to explore novel impurity physics, where heavy dipolar ${}^{164}\mathrm{Dy}$ atoms are immersed in a strongly interacting Fermi superfluid of ${}^6\mathrm{Li}$ atoms.