Strain-Driven Moire Superstructures of Epitaxial Graphene on Transition Metal Surfaces

被引：0

作者：

Merino, Pablo ^{[2
]}

Svec, Martin ^{[2
]}

Pinardi, Anna L. ^{[1
]}

Otero, Gonzalo ^{[1
]}

Martin-Gago, Jose A. ^{[1
,2
]}

机构：

[1] Inst Ciencia Mat Madrid CSIC, Madrid 28049, Spain

[2] INTA CSIC, Ctr Astrobiol, Torrejon De Ardoz 28850, Spain

来源：

ACS NANO | 2011年 / 5卷 / 07期

关键词：

epitaxial graphene; STM; Moire superstructures; strain; PT(111);

D O I：

10.1021/nn201200J

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

STM images of multidomain epitaxial graphene on Pt(111) have been combined with a geometrical model to Investigate the origin of the coincidence Moire superstructures. We show that there Is a relation between the appearance of a particular Moire periodicity and the minimization of the absolute value of the strain between the graphene and the substrate for the different orientations between both atomic lattices. This model predicts all the stable epitaxial graphene structures that can be grown on transition metal surfaces, and we have made use of it for reproducing previously published data from different authors. Its validity suggests that minimization of the strain within the coincident graphene unit-cell due to a strong local interaction is the driving force in the formation of Moire superstructures.

引用

页码：5627 / 5634

页数：8

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