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Potential barrier of Graphene edges (1104.1746v3)
Published 10 Apr 2011 in cond-mat.mtrl-sci and cond-mat.mes-hall
Abstract: We calculated row resolved density of states, charge distribution and work function of graphene's zigzag and armchair edge (either clean or terminated alternatively with H, O or OH group). The zigzag edge saturated via OH group has the lowest work function of 3.76 eV, while the zigzag edge terminated via O has the highest work function of 7.74 eV. The angle-dependent potential barrier on the edge is fitted to a multi-pole model and is explained by the charge distribution.
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