Metallic 2D Janus SNbSe layers driven by a structural phase change

-contrast high angle annular dark field scanning transmission electron microscopy, reveal the phononic and structural properties during Janus SeNbS formation and establish their energetic stability. Density functional theory (DFT) simulations provide insights into the phononic and electronic properties of these materials, shedding light on their potential for diverse applications. Overall, our results demonstrate the realization of niobium-based Janus metals and expand the library of metallic Janus layers.