Plasmon spectrum of graphene monolayer on substrate


Askerzade İ., Askerbeyli R. T.

MODERN PHYSICS LETTERS B, vol.33, no.9, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 9
  • Publication Date: 2019
  • Doi Number: 10.1142/s0217984919501021
  • Journal Name: MODERN PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Plasmon spectrum, graphene, substrate, Coulomb potential, superlattice, CRITICAL-TEMPERATURE, SUPERCONDUCTORS, MODES, FIELD
  • Ankara University Affiliated: Yes

Abstract

Plasmon modes in monolayer graphene on substrate are analyzed taking into account the thickness of graphene and substrate material layer in the evaluation of Coulomb potential. It is shown that plasmon mode in graphene monolayer has linear dispersion in contrast to multilayer graphene in long-wavelength limit. The slope of plasmon spectrum is determined by the thickness and dielectric constant of substrate. Obtained results are in good agreement with experimental data and other theoretical considerations.