石墨烯
材料科学
扫描隧道显微镜
空位缺陷
费米能级
凝聚态物理
单层
基质(水族馆)
磁矩
猝灭(荧光)
晶体缺陷
联轴节(管道)
密度泛函理论
电子结构
图层(电子)
石墨烯纳米带
纳米技术
费米能量
化学物理
计算化学
物理
复合材料
化学
地质学
电子
海洋学
荧光
量子力学
作者
Miguel M. Ugeda,Delia Fernández‐Torre,I. Brihuega,Pablo Jauralde Pou,Antonio J. Martínez‐Galera,Rúben Pérez,José M. Gómez‐Rodríguez
标识
DOI:10.1103/physrevlett.107.116803
摘要
Understanding the coupling of graphene with its local environment is critical to be able to integrate it in tomorrow's electronic devices. Here we show how the presence of a metallic substrate affects the properties of an atomically tailored graphene layer. We have deliberately introduced single carbon vacancies on a graphene monolayer grown on a Pt(111) surface and investigated its impact in the electronic, structural, and magnetic properties of the graphene layer. Our low temperature scanning tunneling microscopy studies, complemented by density functional theory, show the existence of a broad electronic resonance above the Fermi energy associated with the vacancies. Vacancy sites become reactive leading to an increase of the coupling between the graphene layer and the metal substrate at these points; this gives rise to a rapid decay of the localized state and the quenching of the magnetic moment associated with carbon vacancies in freestanding graphene layers.
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