Graphene on Ru(0001): Contact Formation and Chemical Reactivity on the Atomic Scale

被引：47

作者：

Altenburg, S. J. ^{[1
]}

Kroeger, J. ^{[2
]}

Wang, B. ^{[3
]}

Bocquet, M. -L. ^{[3
]}

Lorente, N. ^{[4
]}

Berndt, R. ^{[1
]}

机构：

[1] Univ Kiel, Inst Expt & Angew Phys, D-24098 Kiel, Germany

[2] Tech Univ Ilmenau, Inst Phys, D-98693 Ilmenau, Germany

[3] Univ Lyon, Chim Lab, Ecole Normale Super Lyon, CNRS, F-69007 Lyon, France

[4] Ctr Invest Nanociencia & Nanotecnol CSIC ICN, E-08193 Bellaterra, Spain

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 23期

关键词：

SCANNING-TUNNELING-MICROSCOPY; AUGMENTED-WAVE METHOD; EPITAXIAL GRAPHENE; SYSTEMS;

D O I：

10.1103/PhysRevLett.105.236101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Graphene on Ru(0001) is contacted with Au tips of a cryogenic scanning tunneling microscope. The formation and conductance of single-atom contacts vary within the moire unit cell. Density functional calculations reveal that elastic distortions of the graphene lattice occur at contact due to a selectively enhanced chemical reactivity of C atoms at hollow sites of Ru(0001). Concomitant quantum transport calculations indicate that the graphene-Ru distance determines the conductance variations.

引用

页数：4

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