Realization of Air‐Stable Two‐Dimensional Superconductor Nb 2 Pd 3 Te 5 With Quasi‐One‐Dimensiona
Jiayi Wang, Hui Guo, Hao Zhang, Haowei Chen, Peixuan Li, Xianghe Han, Ziang Wang, Siyu Xu, Qian Fang, Haohao Xu, Shixuan Du, Chengmin Shen, Hui Chen, Wang Yao, Hong‐Jun GaoABSTRACT
Two‐dimensional (2D) superconductors provide a fertile platform for exploring reduced‐dimensional superconductivity and emergent quantum phenomena. Incorporating quasi‐one‐dimensional (quasi‐1D) structural motifs into 2D superconductors offers a powerful route to engineer strong electronic anisotropy, enabling unconventional superconducting states and anisotropic superconducting transport functionalities. However, such systems remain rarely realized. Here we report the realization of a 2D superconductor Nb 2 Pd 3 Te 5 , exhibiting an intrinsic quasi‐1D pair density modulation. Monolayer and bilayer Nb 2 Pd 3 Te 5 is synthesized via van‐der‐Waals epitaxy. Using ultralow‐temperature scanning tunneling microscopy/spectroscopy, we observe the quasi‐1D crystal structure and superconductivity below ∼0.6 K with a pronounced quasi‐1D pair density modulation. Remarkably, both monolayer and bilayer Nb 2 Pd 3 Te 5 show strong air stability. Our findings establish atomically 2D Nb 2 Pd 3 Te 5 as a robust and promising platform for exploring novel low‐dimensional quantum phenomena and anisotropy‐enabled superconducting devices.