Low-energy electronic properties of the AB-stacked few-layer graphites

C. L. Lu, C. P. Chang, Y. C. Huang, J. M. Lu, C. C. Hwang, M. F. Lin

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

In the presence of a perpendicular electric field, the low-energy electronic properties of the AB-stacked N-layer graphites with layer number N ≤ 2, 3, and 4, respectively, are examined through the tight-binding model. The interlayer interactions, the number of layers, and the field strength are closely related to them. The interlayer interactions can significantly change the energy dispersions and produce new band-edge states. Bi-layer and four-layer graphites are two-dimensional semimetals due to a tiny overlap between the valence and conduction bands, while tri-layer graphite is a narrow-gap semiconductor. The electric field affects the low-energy electronic properties: the production of oscillating bands, the cause of subband (anti)crossing, the change in subband spacing, and the increase in band-edge states. Most importantly, the aforementioned effects are revealed completely in the density of states, e.g. the generation of special structures, the shift in peak position, the change in peak height, and the alteration of the band gap.

Original languageEnglish
Article number005
Pages (from-to)5849-5859
Number of pages11
JournalJournal of Physics Condensed Matter
Volume18
Issue number26
DOIs
Publication statusPublished - 2006 Jul 5

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics

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