Quasi-1D graphene superlattices formed on high index surfaces

We report preparation of large area quasi-1D monolayer graphene superlattices on a prototypical high index surface Cu(410)-O and characterization by Raman spectroscopy, Auger electron spectroscopy (AES), low energy electron diffraction (LEED), scanning tunneling microscopy (STM) and scanning tunneli...

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Bibliographic Details
Published in:arXiv.org 2014-02
Main Authors: Lin, Chenfang, Huang, Xiangqian, Ke, Fen, Jin, Chenhao, Tong, Nai, Yin, Xiuli, Gan, Lin, Guo, Xuefeng, Zhao, Ruguang, Yang, Weisheng, Wang, Enge, Hu, Zonghai
Format: Article
Language:English
Subjects:
Brillouin zones
Graphene
Low energy electron diffraction
Periodic variations
Raman spectroscopy
Scanning tunneling microscopy
Spectrum analysis
Substrates
Superlattices
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Summary:We report preparation of large area quasi-1D monolayer graphene superlattices on a prototypical high index surface Cu(410)-O and characterization by Raman spectroscopy, Auger electron spectroscopy (AES), low energy electron diffraction (LEED), scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS). The periodically stepped substrate gives a 1D modulation to graphene, forming a superlattice of the same super-periodicity. Consequently the moire pattern is also quasi-1D, with a different periodicity. Scanning tunneling spectroscopy measurements revealed new Dirac points formed at the superlattice Brillouin zone boundary as predicted by theories.
ISSN:2331-8422
DOI:10.48550/arxiv.1402.4055