The effect of perpendicular electric field on temperature-induced plasmon excitations for intrinsic silicene

Jhao Ying Wu, Chiun Yan Lin, Godfrey Gumbs, Ming Fa Lin

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We use the tight-binding model and the random-phase approximation to investigate the intrinsic plasmon in silicene. At finite temperatures, an undamped plasmon is generated from the interplay between the intraband and the interband-gap transitions. The extent of the plasmon existence range in terms of momentum and temperature, which is dependent on the size of the single-particle-excitation gap, is further tuned by applying a perpendicular electric field. The plasmon becomes damped in the interband-excitation region. A low damped zone is created by the field-induced spin split. The field-dependent plasmon spectrum shows a strong tunability in the plasmon intensity and spectral bandwidth. This could make silicene a very suitable candidate for plasmonic applications.

Original languageEnglish
Pages (from-to)51912-51918
Number of pages7
JournalRSC Advances
Volume5
Issue number64
DOIs
Publication statusPublished - 2015 Jan 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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