Electric-field-induced plasmon in AA-stacked bilayer graphene

Y. C. Chuang, J. Y. Wu, M. F. Lin

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The collective excitations in AA-stacked bilayer graphene for a perpendicular electric field are investigated analytically within the tight-binding model and the random-phase approximation. Such a field destroys the uniform probability distribution of the four sublattices. This drives a symmetry breaking between the intralayer and interlayer polarization intensities from the intrapair band excitations. A field-induced acoustic plasmon thus emerges in addition to the strongly field-tunable intrinsic acoustic and optical plasmons. At long wavelengths, the three modes show different dispersions and field dependence. The definite physical mechanism of the electrically inducible and tunable mode can be expected to also be present in other AA-stacked few-layer graphenes.

Original languageEnglish
Pages (from-to)298-306
Number of pages9
JournalAnnals of Physics
Volume339
DOIs
Publication statusPublished - 2013 Dec

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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