Electronic properties of curved graphene nanoribbons

T. S. Li, M. F. Lin, C. Y. Lin, S. C. Chang, S. P. Yang

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)

摘要

The electronic properties of curved graphene nanoribbons in the presence of uniform electric fields are investigated by using the tight-binding method. The energy dispersion, density of states, and wave function depend sensitively on the magnitude and direction of the electric field, and the curvature of the nanoribbon. An electric field separates the partial flat bands, causes band-mixing, creates new band-edge states, and induces semiconductor-metal transitions. The energy difference between the partial flat bands grows as the curvature, or the central angle, diminishes. The energy gap demonstrates a declining behavior with rising ribbon width. There are many density-of-states divergent peaks in the curved graphene nanoribbon, owing to the 1D subbands. The number, height, and energy of the density-of-states peaks are found to be dependent on the magnitude and direction of the electric field, and the curvature of the nanoribbon. The electric field causes electron transfer between different sublattices and among different atoms within the same sublattice, and introduces extra nodes into the wave function.

原文English
頁(從 - 到)7-14
頁數8
期刊Synthetic Metals
171
DOIs
出版狀態Published - 2013

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 材料力學
  • 機械工業
  • 金屬和合金
  • 材料化學

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