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Applied Physics A

, Volume 109, Issue 2, pp 353–356 | Cite as

Graphene with the secondary amine-terminated zigzag edge as a line electron emitter

  • Weiliang Wang
  • Zhibing Li
Article

Abstract

An extraordinary low vacuum barrier height of 2.30 eV has been found on the zigzag-edge of graphene terminated with the secondary amine via the ab initio calculation. This edge structure has a flat band of edge states attached to the gamma point where the transversal kinetic energy is vanishing. We show that the field electron emission is dominated by the flat band. The edge states pin the Fermi level to a constant, leading to an extremely narrow emission energy width. The graphene with such edge is a promising line field electron emitter that can produce a highly coherent emission current.

Keywords

Fermi Level Local Density Approximation Edge State Flat Band Band Structure Calculation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The project was supported by the National Basic Research Program of China (Grant Nos. 2007CB935500 and 2008AA03A314), the National Natural Science Foundation of China (Grant Nos. 11104358 and 11274393), the high-performance grid computing platform of Sun Yat-sen University, the Guangdong Province Key Laboratory of Computational Science, and the Guangdong Province Computational Science Innovative Research Team.

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and EngineeringSun Yat-sen UniversityGuangzhouP.R. China

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