Edge state effects in junctions with graphene electrodes

Dmitry A. Ryndyk, Jan Bundesmann, Ming Hao Liu, Klaus Richter

研究成果: Article同行評審

22 引文 斯高帕斯(Scopus)

摘要

We consider plane junctions with graphene electrodes, which are formed by a single-level system ("molecule") placed between the edges of two single-layer graphene half planes. We calculate the edge Green functions of the electrodes and the corresponding lead self-energies for the molecular levels in the cases of semi-infinite single-layer electrodes with armchair and zigzag edges. We show two main effects: first, a peculiar energy-dependent level broadening, reflecting at low energies the linear energy dependence of the bulk density of states in graphene, and, second, the shift and splitting of the molecular level energy, especially pronounced in the case of the zigzag edges due to the influence of the edge states. These effects give rise to peculiar conductance features at finite bias and gate voltages.

原文English
文章編號195425
期刊Physical Review B - Condensed Matter and Materials Physics
86
發行號19
DOIs
出版狀態Published - 2012 11月 21

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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