标题： 基于三角烯的超原子石墨烯的半金属性 显示英文标题

标题： Half-Metallicity in Triangulene-based Superatomic Graphene

摘要： 二维（2D）磁体的发现为自旋电子器件的小型化至单层极限打开了新的可能性。当自旋轨道耦合作用最小时，2D 半金属能够传导完全自旋极化的电流，这一特性为其提升设备性能提供了关键优势。然而，尽管进行了大量的理论研究以寻找2D半金属，但其实现仍然困难重重。 在此，我们报告了超原子石墨烯的自下而上合成及其半金属性质的展示。所生产的石墨烯半金属是通过磷掺杂三角烯作为构建块，并采用表面合成方法制备而成的。扫描隧道显微镜测量揭示了其金属能带结构，并通过不同磁场下的磁子激发识别出其铁磁性。密度泛函理论模拟准确捕捉到了其半金属特性，揭示了超原子石墨烯的 p$_x,_y$类轨道中自旋极化带的起源。我们的工作证明了本征二维碳磁性，为利用其在自旋电子学中的优势铺平了道路。 显示英文摘要

摘要： The discovery of two-dimensional (2D) magnets has opened up new possibilities for miniaturizing spintronic devices to the monolayer limit. 2D half-metals, capable of conducting fully spin-polarized currents when spin-orbit coupling is minimal, provide a key advantage in improving device performance. Extensive theoretical research has been carried out to discover 2D half-metals, yet their realization remains elusive. Here we report the bottom-up synthesis of superatomic graphene and the demonstration of its half-metallic properties. The produced graphene half-metal is fabricated through an on-surface synthetic approach with phosphorus-doped triangulene as its building block. Scanning tunneling microscopy measurements reveal its metallic band structures and identify its ferromagnetism through magnon excitation under varying magnetic fields. Density functional theory simulations accurately capture its half-metallic characteristics, uncovering the origin of spin-polarized bands from the p$_x,_y$-like orbital of superatomic graphene. Our work demonstrates intrinsic 2D carbon magnetism, paving the way for harnessing its advantages in spintronics.