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Quasi-1D graphene superlattices formed on high index surfaces

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arxiv 1402.4055 v1 pith:NJA3PW7V submitted 2014-02-17 cond-mat.mtrl-sci cond-mat.mes-hall

Quasi-1D graphene superlattices formed on high index surfaces

Chenfang Lin , Xiangqian Huang , Fen Ke , Chenhao Jin , Nai Tong , Xiuli Yin , Lin Gan , Xuefeng Guo
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Ruguang Zhao Weisheng Yang Enge Wang Zonghai Hu
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classification cond-mat.mtrl-sci cond-mat.mes-hall
keywords spectroscopygraphenequasi-1dscanningtunnelingelectronformedhigh
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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.

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