2019/06/30 by Aravind Devarakonda, Hisashi Inoue, Shiang Fang +7 · 1 citation
Physics and Astronomy · #cond-mat.supr-con
paper · pdf · doi:10.1126/science.aaz6643
published as Science 370, 231-236 (2020) · Accepted version with revised title, discussion, structure, and figures. 38 pages, 4 figures
arxiv created 2020/10/11 · arxiv updated 2020/10/13
Advances in low-dimensional superconductivity are often realized through improvements in material quality. Apart from a small group of organic materials, there is a near absence of clean-limit two-dimensional (2D) superconductors, which presents an impediment to the pursuit of numerous long-standing predictions for exotic superconductivity with fragile pairing symmetries. Here, we report the development of a bulk superlattice consisting of the transition metal dichalcogenide (TMD) superconductor 2H-niobium disulfide (2H-NbS2) and a commensurate block layer that yields dramatically enhanced two-dimensionality, high electronic quality, and clean-limit inorganic 2D superconductivity. The structure of this material may naturally be extended to generate a distinct family of 2D superconductors, topological insulators, and excitonic systems based on TMDs with improved material properties.