Lieb Lattices Formed by Real Atoms on Ag(111) and Their Lattice Constant-Dependent Electronic Properties
Xiaoxia Li1† , Qili Li1† , Tongzhou Ji1 , Ruige Yan1 , Wenlin Fan1 , Bingfeng Miao1,2 , Liang Sun1,2 , Gong Chen1,2 , Weiyi Zhang1,2 , and Haifeng Ding1,2*
1 National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China2 Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
Abstract ：Scanning tunneling microscopy is a powerful tool to build artificial atomic structures that do not exist in nature but possess exotic properties. In this study, we constructed Lieb lattices with different lattice constants by real atoms, i.e., Fe atoms on Ag(111), and probed their electronic properties. We obtain a surprising long-range effective electron wavefunction overlap between Fe adatoms as it exhibits a $\frac{1}{r^{2}}$ dependence with the interatomic distance $r$ instead of the theoretically predicted exponential one. Combining control experiments, tight-binding modeling, and Green's function calculations, we attribute the observed long-range overlap to being enabled by the surface state. Our findings enrich the understanding of the electron wavefunction overlap and provide a convenient platform to design and explore artificial structures and future devices with real atoms.
收稿日期: 2022-02-10
Editors' Suggestion
出版日期: 2022-04-26
:
68.37.Ef
(Scanning tunneling microscopy (including chemistry induced with STM))
73.20.At
(Surface states, band structure, electron density of states)
73.20.-r
(Electron states at surfaces and interfaces)
引用本文:
. [J]. 中国物理快报, 2022, 39(5): 57301-.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/39/5/057301
或
https://cpl.iphy.ac.cn/CN/Y2022/V39/I5/57301
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2022, Vol. 39 
