Lieb Lattices Formed by Real Atoms on Ag(111)and Their Lattice Constant-Dependent Electronic Properties  

作　　者：Xiaoxia Li Qili Li Tongzhou Ji Ruige Yan Wenlin Fan Bingfeng Miao Liang Sun Gong Chen Weiyi Zhang Haifeng Ding 李小霞;李启立;吉同舟;闫睿戈;范文琳;缪冰锋;孙亮;陈宫;章维益;丁海峰(National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093,China;Collaborative Innovation Center of Advanced Microstructures,Nanjing 210093,China)

机构地区：[1]National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093,China [2]Collaborative Innovation Center of Advanced Microstructures,Nanjing 210093,China

出　　处：《Chinese Physics Letters》2022年第5期71-75,共5页中国物理快报（英文版）

基　　金：supported by the National Key R&D Program of China(Grant Nos.2017YFA0303202 and 2018YFA0306004);the National Natural Science Foundation of China(Grant Nos.11974165,92165103,51971110,and 11734006);the China Postdoctoral Science Foundation(Grant No.2019M651766);the Natural Science Foundation of Jiangsu Province(Grant No.BK20190057)。

摘　　要：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 1/r;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.

关 键 词：properties OVERLAP EXPONENTIAL 

分 类 号：O469[理学—凝聚态物理]