Inducing or enhancing superconductivity in topological materials is an important route toward topological superconductivity. Reducing the thickness of transition metal dichalcogenides (e.g. WTe₂ and MoTe₂) has provided an important pathway to engineer superconductivity in topological matters. However, such monolayer sample is difficult to obtain, unstable in air, and with extremely low T_c. Here we report an experimentally convenient approach to control the interlayer coupling to achieve tailored topological properties, enhanced superconductivity and good sample stability through organic-cation intercalation of the Weyl semimetals MoTe₂ and WTe₂. The as-formed organic-inorganic hybrid crystals are weak topological insulators with enhanced T_c of 7.0 K for intercalated MoTe₂ (0.25 K for pristine crystal) and 2.3 K for intercalated WTe₂ (2.8 times compared to monolayer WTe₂). Such organic-cation intercalation method can be readily applied to many other layered crystals, providing a new pathway for manipulating their electronic, topological and superconducting properties.

在拓扑材料中诱导或增强超导性是实现拓扑超导的重要途径。降低过渡金属二硫化物（例如 WTe ₂和 MoTe ₂）的厚度为在拓扑物质中设计超导性提供了重要途径。_{然而，这种单层样品获取困难，在空气中不稳定，} Tc极低。_{在这里，我们报告了一种通过实验方便的方法来控制层间耦合，以通过有机阳离子插层 Weyl 半金属 MoTe 2}和 WTe ₂实现定制的拓扑特性、增强的超导性和良好的样品稳定性. 形成的有机-无机杂化晶体是弱拓扑绝缘体，插层 MoTe 2 的 T c 增强_为7.0 _K（原始晶体为 0.25 K），插层 WTe ₂为 2.3 K （是单层 WTe ₂的 2.8 倍）。这种有机阳离子嵌入方法可以很容易地应用于许多其他层状晶体，为操纵它们的电子、拓扑和超导特性提供了一条新途径。