Author(s): Fan Jia, Zhichao Guo, Zerong Huang, and Dajun Wang We report the first creation of a bulk sample of ultracold heteronuclear $p$-wave Feshbach molecules in an optically trapped Bose-Bose mixture of $^{23}\mathrm{Na}$ and $^{87}\mathrm{Rb}$ atoms. Using loss spectroscopy and binding energy measurements, we systematically characterize the interspecies … [Phys. Rev. Lett. 137, 093001] Published Wed Aug 26, 2026