Realization of Air-Stable Two-Dimensional Superconductor Nb<sub>2</sub>Pd<sub>3</sub>Te<sub>5</sub> With Quasi-One-Dimensional Pair Density Modulation.
basic_science · Level V
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- Record sourced from PubMed, PMID 42605686.
- Also identified by DOI 10.1002/adma.74711.
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Abstract
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<sub>2</sub>Pd<sub>3</sub>Te<sub>5</sub>, exhibiting an intrinsic quasi-1D pair density modulation. Monolayer and bilayer Nb<sub>2</sub>Pd<sub>3</sub>Te<sub>5</sub> 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<sub>2</sub>Pd<sub>3</sub>Te<sub>5</sub> show strong air stability. Our findings establish atomically 2D Nb<sub>2</sub>Pd<sub>3</sub>Te<sub>5</sub> as a robust and promising platform for exploring novel low-dimensional quantum phenomena and anisotropy-enabled superconducting devices.