Coulomb excitations in AA- and AB-stacked bilayer graphites

J. H. Ho, C. L. Lu, C. C. Hwang, C. P. Chang, M. F. Lin

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

The π -electronic excitations are studied for the AA- and AB-stacked bilayer graphites within the linear self-consistent-field approach. They are strongly affected by the stacking sequence, the interlayer atomic interactions, the interlayer Coulomb interactions, and the magnitude of the transferred momentum. However, they hardly depend on the direction of the transferred momentum and the temperature. There are three low-frequency plasmon modes in the AA-stacked system but not the AB-stacked system. The AA- and AB-stacked plasmons exhibit the similar π plasmons. The first low-frequency plasmon behaves as an acoustic plasmon, and the others belong to optical plasmons. The bilayer graphites quite differ from the monolayer graphite and the AB-stacked bulk graphite, such as the low-frequency plasmons and the small-momentum π plasmons.

Original languageEnglish
Article number085406
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number8
DOIs
Publication statusPublished - 2006 Aug 21

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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