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Superatomic crystals are composed of discrete modular clusters that emulatethe role of atoms in traditional atomic solids$^{1-4}$. Owing to their uniquehierarchical structures, these materials are promising candidates to hostexotic phenomena, such as superconductivity and magnetism that can be revealedthrough doping$^{5-10}$. Low-dimensional superatomic crystals hold greatpromise as electronic components$^{11,12}$, enabling these properties to beapplied to nanocircuits, but the impact of doping in such compounds remainsunexplored. Here we report the electrical transport properties ofRe$_6$Se$_8$Cl$_2$, a two-dimensional superatomic semiconductor$^{13,14}$.Using an in situ current annealing technique, we find that this compound can ben-doped through Cl dissociation, drastically altering the transport behaviourfrom semiconducting to metallic and giving rise to superconductivity below$\sim$ 9 K. This work is the first example of superconductivity in a van derWaals (vdW) superatomic crystal; more broadly, it establishes a new chemicalstrategy to manipulate the electronic properties of vdW materials with labileligands.

Doping-induced superconductivity in the van der Waals superatomic crystal Re$_6$Se$_8$Cl$_2$