Electron Wave Function in Armchair Graphene Nanoribbons

Details Electron Wave Function in Armchair Graphene Nanoribbons Electron Wave Function in Armchair Graphene Nanoribbons

2010-10-19

arxiv.org/abs/1010.3817v1

J. Phys. Soc. Jpn. 80 (2011) 044710

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 4 figures

Scientific paper

10.1143/JPSJ.80.044710

By using analytical solution of a tight-binding model for armchair nanoribbons, it is confirmed that the solution represents the standing wave formed by intervalley scattering and that pseudospin is invariant under the scattering. The phase space of armchair nanoribbon which includes a single Dirac singularity is specified. By examining the effects of boundary perturbations on the wave function, we suggest that the existance of a strong boundary potential is inconsistent with the observation in a recent scanning tunneling microscopy. Some of the possible electron-density superstructure patterns near a step armchair edge located on top of graphite are presented. It is demonstrated that a selection rule for the G band in Raman spectroscopy can be most easily reproduced with the analytical solution.

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