单层
范德瓦尔斯力
石墨烯
超导电性
薄脆饼
悬空债券
材料科学
纳米技术
化学气相沉积
凝聚态物理
过渡金属
光电子学
化学
硅
分子
催化作用
物理
生物化学
有机化学
作者
Zihao Fu,Zihao Wan,Hui Wang,Kun Yu,Yichen Feng,Zhi Fang,Xiaoxiang Xi,Dong Li,Zhenjia Zhou,Anlian Pan,Libo Gao
出处
期刊:2D materials
[IOP Publishing]
日期:2024-12-17
标识
DOI:10.1088/2053-1583/ada045
摘要
Abstract Two-dimensional (2D) superconductors have desirable physical properties and a wide range of potential applications. However, many 2D superconducting materials have poor structural integrity and performance at thicknesses down to monolayer. Therefore, they are still hardly exploited in large-scale practical applications. In this study, we demonstrate a growth strategy based on the two-step vapor deposition process and van der Waals (vdW) ultra-flat graphene as a buffer layer, and thereafter realize the wafer-scale monolayer transition metal dichalcogenide (TMD) films, especially for 2D TMD superconductors. By comparing different non-vdW and vdW growth substrates, we demonstrate that ultra-flat graphene films provide an atomically smooth surface and effectively isolates oxygen-dangling bonds, and finally promote the superconducting behaviours of monolayer NbSe2 and TaS2 films. This growth strategy could also be extended to other wafer-scale TMD films and be of both fundamental and technological significance in the development of wafer-scale monolayer TMD-based devices.
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