期刊
NANO LETTERS
卷 11, 期 11, 页码 4527-4534出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl201370m
关键词
Graphene; superlattice; Raman spectroscopy; double-resonance Raman; lattice resolution AFM; Moire pattern
类别
资金
- Inmetro
- FAPERJ
- Brazilian agency CNPq
- Brazilian agency FAPEMIG
When two identical two-dimensional periodic structures are superposed, a mismatch rotation angle between the structures generates a supetiattice. This effect is commonly observed in graphite, where the rotation between graphene layers generates Moire patterns in scanning tunneling microscopy images. Here, a study of intravalley and intervalley double-resonance Raman processes mediated by static potentials in rotationally stacked bilayer graphene is presented. The peak properties depend on the mismatch rotation angle and can be used as an optical signature for superlattices in bilayer graphene. An atomic force microscopy system is used to produce and identify specific rotationally stacked bilayer graphenes that demonstrate the validity of our model.
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