Doping-Induced Superconductivity in the van der Waals Superatomic Crystal Re6Se8Cl2

• DOI: 10.1021/acs.nanolett.9b04891
• Publication Date: 2020-02-17T17:44:13Z
• Authors: Evan J. Telford; Jake C. Russell; Joshua R. Swann; Brandon Fowler; Xiaoman Wang; Kihong Lee; Amirali Zangiabadi; Kenji Watanabe; Takashi Taniguchi; Colin Nuckolls; Patrick Batail; Xiaoyang Zhu; Jonathan A. Malen; Cory R. Dean; Xavier Roy
• Keywords: Crystal (programming language)

Superatomic crystals are composed of discrete modular clusters that emulate the role atoms in traditional atomic solids$^{1-4}$. Owing to their unique hierarchical structures, these materials promising candidates host exotic phenomena, such as superconductivity and magnetism can be revealed through doping$^{5-10}$. Low-dimensional superatomic hold great promise electronic components$^{11,12}$, enabling properties applied nanocircuits, but impact doping compounds remains unexplored. Here we report electrical transport Re$_6$Se$_8$Cl$_2$, a two-dimensional semiconductor$^{13,14}$. Using an situ current annealing technique, find this compound n-doped Cl dissociation, drastically altering behaviour from semiconducting metallic giving rise below $\sim$ 9 K. This work is first example van der Waals (vdW) crystal; more broadly, it establishes new chemical strategy manipulate vdW with labile ligands.