论文标题
由Ag（111）及其晶格常数依赖电子特性形成的LIEB晶格
Lieb lattices formed by real atoms on Ag(111) and their lattice constant dependent electronic properties
论文作者
论文摘要
扫描隧道显微镜是建立人造原子结构的强大工具，甚至在自然界中都不存在，而是具有异国特性。我们在这里通过真实原子，即Ag（111）上的Fe Atoms构建了具有不同晶格常数的Lieb Lattices，并探测了它们的电子特性。我们发现，Fe Atatoms之间令人惊讶的远程有效电子波函数重叠，因为它表现出与原子间距离R相关的1/R2依赖性，而不是理论上预测的指数。结合了控制实验，紧密结合和绿色的功能计算，我们将观察到的远程重叠归因于表面状态。我们的发现不仅丰富了对电子波函数重叠的理解，而且还提供了一个方便的平台来设计和探索具有真实原子的人造结构和未来设备。
Scanning tunneling microscopy is a powerful tool to build artificial atomic structures even not exist in nature but possess exotic properties. We here constructed Lieb lattices with different lattice constants by real atoms, i.e., Fe atoms on Ag(111) and probed their electronic properties. We find a surprising long-range effective electron wavefunction overlap between Fe adatoms as it exhibits a 1/r2-dependence with the interatomic distance r instead of the theoretically predicted exponential one. Combining control experiments, tight-binding and Green's function calculations, we attribute the observed long-range overlap to be enabled by the surface state. Our findings not only enrich the understanding of the electron wavefunction overlap, but also provide a convenient platform to design and explore the artificial structures and future devices with real atoms.
